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Home theatres are worth it
A projector is more fun to watch movies and play video games on than a TV screen. Compared to a projector, even a large high definition TV screen is plain and ordinary. A home theatre will impress people, a new television, not so much.
An excellent home theatre will even make your home more valuable. If you turn a spare room that isn't used for much into a home theatre, your home's value could go up. Your home theatre will have to be set up very well for it to make your home more valuable.
1080p vs 4k projector
While 4K is a higher resolution than 1080p, 1080p still delivers a sharp picture. 1080p is high resolution, just not as high as 4K is. Can you notice the difference between 1080p and 4K, or is 1080p already good enough that further improvement doesn't make much of a difference?
Whether or not the difference is very noticeable depends on how far you are sitting from the screen. If you are sitting far enough away from the screen, you might not notice the difference unless you pay attention to it.
From closer up, 4K looks quite noticeably better to most people. New technology for better screen or projector resolution still matters. Technology has not yet advanced so far that no one can notice the difference when resolution improves.
A 4K screen is 3840 by 2160 pixels, compared to 1920 by 1080 pixels for a 1080p screen. A larger television screen needs more resolution than a smaller screen to show a clear picture, and you need even more resolution if you are using a projector. Even though 1080p does not usually give you a bad looking picture, 4K is better.
The size of the theater room matters
If your home theater is in a small room, you might not need a 4K projector. High resolution is more important if you are projecting a larger image. You also need to buy a brighter projector for larger images.
If you want to be able to adjust your viewing distance with as much flexibility as possible, you should get a 1080p projector. You cannot adjust the viewing distance by nearly as much with 4K technology.
Is it harder to install a 4K projector than a 1080p projector?
No. The new 4K technology is neither more complicated to install nor easier to install. The steps you go through when setting it up are the same for either resolution.
Is 4K one-sidedly better than 1080p?
An excellent projector must have a high contrast ratio and not only high resolution. If there is a high contrast ratio, there will be as much of a difference between the lightest and the darkest colors as possible. The white colors will be bright white, and the dark colors very black if the contrast ratio is high.
The contrast ratio matters a lot. With a better contrast ratio, you get a quite noticeably sharper picture. If the contrast ratio is "1000 to 1", this means that the whitest possible color is 1000 times brighter than the darkest possible color.
Some projectors have contrast ratios of 10,000 to 1 or more. If a projector offers 4K resolution but does not offer a high contrast ratio, it might not be an excellent projector. A 1080p device with much better contrast is superior if you do not project a very large image.
Can you get television shows in 4K?
Sometimes, but usually not, at least not so far. It may be possible to get shows in 4K in a few years, but television tends to be 1080p.
Streaming services like Netflix or Hulu are only available in 1080p. Most streaming services that aim to replace your cable service are also not available in 4K. Cable and satellite aren't any better - most shows are in standard 1080p or even lower resolution.
The right way to get 4K entertainment is to buy 4K Blu-Ray discs. Ideally, it would be best if you purchased discs instead of streaming all of your movies. Streamed 4K entertainment is excellent, but there is another step up from there to 4K Blu-ray discs.
Physical 4K discs offer movies in the absolute best picture quality. Streamed 4K films also look quite good, but they are still not as good as ultra HD blu-ray discs. A Blu-ray disc contains several times more information than a streamed 4K film.
Do games look better on a 4K projector?
Yes, if you have a newer console, you can get games that offer 4K resolution. A more modern PC can also handle 4K gaming, and plenty of games released in recent years let you turn the graphics up to 4K.
Not all projectors are well suited for gaming, and if you want an enjoyable gaming experience, you need a projector designed with gaming in mind. With many projectors, there is a bit of a delay between the console and the projector.
Because of the delay, you can press a button and not have the game react instantly. The delay is not very long, but it is noticeable, and it will hurt your gaming experience. Get a projector that offers "game mode" - no or very minimal delay - or else you will not like playing games with your projector.
Are 4K projectors still much more expensive?
Yes, a 4K projector is still more expensive. The price of 4K projectors is rapidly falling, but it may still take years before they are no longer much more expensive than standard 1080p equipment.
However, if you are serious about setting up a home theatre, you might as well make it as impressive as possible. If you have money, a 4K projector may be worth its price.
Some 4K projectors are cheaper than others. Do not assume that you still have to spend several thousand dollars if you want a 4K projector - you can get one for less than a thousand dollars nowadays. A cheaper 4K projector is still more expensive than a cheaper 1080p projector, but 4K projectors do not cost a fortune anymore.
If you are getting a cheaper 4K projector, make sure that the quality is high. A low-quality 4K projector is a much worse choice than a high quality 1080p one.
Advantages and disadvantages of 4K projectors
4K projectors not only offer better resolution but tend to be higher-end devices in general. 4K devices tend to have better contrast than 1080p projectors and tend to be brighter also. If you have a fair bit of money to spend, you will probably buy a 4K device for its resolution and its other advantages.
However, not every 4K projector is a high-end machine in other ways. If you buy a 4K projector that is dim or lacking in contrast, the resolution will not make up for it.
The main disadvantage of a 4K projector is that it is more expensive. If you find a cheap 4K projector, be careful not to buy a projector that is substandard in other ways.
Some projectors are brighter than others
The brightness of a projector is measured in lumens. The more lumens worth of light your projector can create, the bigger you can make the image without it getting dim. These measurements are inexact, so a projector offering 3000 lumens is not necessarily brighter than one offering 2800.
If two projectors are similar other than in brightness, the brighter one is always better. Don't worry about the image being too bright; you can dim it slightly if you think it looks better with the brightness turned down a little.
Usually, 2000 lumens is enough to create a bright 100-inch image. One thousand lumens is too little and will not give you an excellent picture. Three thousand or more lumens is ideal, but you only need 2000 or somewhat less than that.
Since 4K resolution is more of a luxury than a necessity, you should prefer a bright 1080p projector to a dim 4K projector. A projector that only offers 1000 lumens does give you an acceptable rather than a poor picture, but 2000 looks much better.
A high-end home projector may offer as much as 20,000 lumens. That amount of power is unnecessary unless you want to project a much larger image than is typical for home theatres.
LEDs and other types of light sources
A digital projector needs a light source to create an image. The light is focused on a chip, and the chip creates the image. Different projectors use different light sources.
Projectors use lasers, LEDs, and ultra-high-pressure (UHP) lamps to create enough light to project a bright image. UHP lamps are the most straightforward technology. Despite their fancy name, they are just powerful light bulbs.
UHP lamps are popular because they are cheap and create a very bright image. Their downside is that you will have to replace the lamp once in a while - it will get less bright over time otherwise.
Some lamps last longer than others. At best, a lamp might last 15,000 hours - several years worth of heavy use - before you need to replace it. However, the lamps do cost as much as a few hundred dollars to replace, so you might be better off getting a projector that uses a longer-lasting light source.
Some newer projectors use LED lights instead of UHP lamps. LED lights do not use as much electricity and last longer than UHP lamps. Don't insist on an LED projector - if the projector you want uses a UHP lamp, get it.
One thing you may notice about LED projectors is that they are not as bright as more common UHP lamp projectors. Only expensive high end LED projectors are very bright. Only go with LEDs if you are looking for something above the average price.
Lasers are another option. Laser projectors often have a better, more colorful image than standard UHP projectors do, although the better range of colors does not make a huge difference.
Laser projectors are also typically more expensive than UHP projectors, although they can still be reasonably cheap. The type of light source does not make an enormous difference, so you should look at brightness and resolution before caring about the type of light source.
The advantages of lens shift
If a projector has lens shift, you can project the image higher or lower without moving the projector around. If your projector does not allow for lens shift, you will have to set your projector up on a stand that is just the right height.
Can you watch movies in 3D at home with a projector?
Yes, you can watch 3D movies at home with the right projector and 3D glasses. This is not yet a standard feature for a projector to have, but many projectors do offer it.
Short throw VS long throw
A short throw projector is supposed to be close to the screen, and a long throw projector is supposed to be far from the screen. Neither short throw nor long throw is better; it depends on the size of the room your home theatre is in.
Get a projector that is well suited to the size of the room you are using. Plan your home theatre out before you buy anything.