Linked for coolness: Depth-sensing camera, an LCD projector, and some genius
The most interesting part of this is the depth-sensing camera that can measure the distance from the camera to every pixel. You can think of it as a camera that gives you a real-time z-buffer of the real world. This can really result in some cool applications once it gets affordable. Real-time 3D scanning is a given. But you could also do "green screen" without needing a screen (just set the depth beyond which you want objects to disappear). Really good computer vision is another possibility. I can also imagine some cool game concepts with a fixed or movable depth-sensing camera.