The biggest reason to get a projector is because its image can be, well, big. When you first experience watching a blockbuster movie, or playing a game, or cheering on your local sports team in your living room with the picture taking up most of your wall, it’s exciting and intoxicating. But if you’re watching that wall-sized picture on the literal wall, you’re not only visually doing yourself (and the money you spent on an excellent projector) a disservice, you’re affecting the projector’s performance. Potentially to a drastic degree.
Now, if you’re using a pico projector or something that’s designed for its portability that only costs a few hundred dollars, by all means use a wall for some quick temporary viewing or to have on in the background. But if the whole idea was to replace your TV with a projector, it’s important to understand why you should stop using a wall as your screen surface.
Dispatches From The Front 