Rememeber Microsoft's balls-to-the-wall crazy IllumiRoom idea, when it wanted to use a projector-type gadget to transforms rooms into immersive gaming experiences by projecting video games all over them? Yeah, they're still doing that. It's called RoomAlive now.
RoomAlive is a proof-of-concept prototype showing what it'd be like if Microsoft figured out how to use Kinect and projectors to make you feel like you were in the world of the video game in your house. It detects where the walls are and sends holographic images accordingly.
This is still just a demo and the equipment used to make the prototype is way too expensive to reproduce for commercial purposes, so it's not like you're going to be able to pick one of these holodeck-style RoomAlive systems up in time to give your nephew an excellent holiday gift. [The Verge]