In the quest for ever-larger television and computer monitors and the advent of HD (and Ultra-HD), it is now possible to watch a movie, (clearly), where the characters are larger than you are. (Who needs anything that big anyway?)
The answer, more often than not, is entertainment, science, military, and government with a good dose of retailing on the side.
However, unless you are insanely wealthy, the thought of replacing one of these monstrosities would make the most stalwart Navy Seal weak in the knees.
With a video wall, you can significantly reduce component cost and increase your flexibility at the same time. You can increase the size of your viewing area by using the system to link several moderately sized monitors together. In the event of component failure, you need only replace the individual monitor affected, not the entire system. (Much as it is easier and cheaper to change a light bulb instead of having to rewire the whole house.)
NASA uses a video wall to track the space shuttle as it circumnavigates the Earth. (Squashing that down onto one monitor would drastically reduce the size of the image, to the point where it would be impossible to make a coherent assessment of the information presented.) It would not be impossible to imagine them having a larger videowall to keep track of individual pieces of space debris. [More objects require more space to delineate them.]
Following this reasoning, having the capability to add in monitors as the number of pieces of junk increases (requiring a larger format to see them all) instead of having to start over with a larger screen makes the video wall system an even bigger benefit.
Knowing many of the applications for which video walls are used, they are designed with multiple redundancies and ‘hot swap capabilities; components can be replaced without the requirement that the system is shut down to do it. They can be run on a 24/7 basis for over 5 years and use their own system specific cooling system.
As a benefit to entertainment, it will color correct all the monitors in your array so that they all broadcast on the same wavelength. (We’ve all been in the electronics store where that one television is a lot heavier on the red than the rest.)
Most systems will automatically convert multiple video formats into one integrated stream as necessary.
Because the operating system is based on Windows technology, running it is almost as easy as using your computer. (Don’t worry if you are not computer savvy, they have a full complement of technicians who can install and maintain your system, as well as train anyone designated to see to the day-to-day operations. Also, if you do need additional support, a dedicated account manager can help; with the wonderful benefit that you don’t have to start from square one every time you need assistance, your account manager knows everything that has happened.)
As technology advances, and the price of these innovations comes down; maybe you won’t have to be insanely wealthy to have your own (truly) home theater.