Since the introduction of the Nintendo Wii with all its Wiimote goodness, videogame controllers have gotten more and more sophisticated, going way beyond button pushes to read gestures and even emotions. Add eyeballs to that list. Researchers at Britain's De Montfort University have created an interface that can read the movements of the eye, enabling players to control games with just their gaze.
The system consists of two parts: First, infrared LEDs mounted at the bottom of a computer monitor send light to the subject's eyes. Then "stereo" cameras interpret the reflected IR light to track exactly where the person is looking. It's said to be accurate to 5 millimeters, or about the width of a paper clip.
Originally conceived to let disabled people play a little GTA IV with the best of them, the system would also be great for gamers who want to add that extra edge. After all, just think how fast your eye-hand coordination would be if you took the hand out of the equation?