This technology can detect your head, not just your face, recognizing not only where your head is, but where you're looking. This tech runs on the GPU, this currently meaning that it'll work at 500 frames per second - quick! This tech is demonstrated by Anand Agarawata who shows off a white tablet with several objects on it displayed on the screen of a Motorola XOOM tablet moving in accordance with his head. Wacky!

-- announced at Google I/O 2011