The Kinect (originally known by the code name Project Natal), is a “controller-free gaming and entertainment experience” by Microsoft for the Xbox 360 video game platform, and may later be supported by PCs via Windows 8. (Wikipedia)
Very basically, it is a camera that can sense your movements and interpret those to control a game, or a computer. Sounds cool, eh? The Kinect is finding uses in all sorts of things. Have a look at this video where the Kinect is used to power a very advanced (even futuristic) computer control interface:
It seems that the Kinect and devices like it are leading us boldly into the realm of science fiction. God news?