They've really rocketed in popularity because people love the idea of being able to point the projector at a wall anywhere to instantly have big-screen entertainment. Well, stop that right now.

Like any projector, they also can't compete with ambient light. An ambient light-rejecting screen can help considerably, but they aren't cheap. When you can get a 100-inch TV for $3,000, which will be ...

To get the maximum size of 200 inches, for instance, the projector needs to be 16.4 feet from the screen, and the picture gets smaller the closer it moves to the screen. It currently ranks second ...