Attaching a battery-operated microprojector to a video game fun controller is a clever idea. That way, you can get the experience of looking around you in a dark room and seeing another world. This likely is most interesting for first-person-shooter games that involve a lot of wandering around in the dark with a flashlight and a gun. There are some practical isssues -- the projector is not very bright, and you need white walls, few windows, and an uncluttered room to be able to see clearly.
Read the full review here
Read the full review here