Technically, you don’t need a screen to use an ultra-short-throw laser projector. As long as you have enough wall space, you can use the device to watch whatever TV show, movie or game you want. But to really get the most out of high-quality projector you need an ambient light rejecting (ALR) screen, which enhances brightness and contrast so that nothing looks washed out. And rather than making you go through the trouble of finding one of your own, the Vanish comes with it.