Look, no hands! Eye-tracking World of Warcraft interface lets you grind mobs on sight

Researchers at the De Montford University, UK are developing a pioneering new eye-tracking system to enable users to control computers with out touching a keyboard or mouse.

The Eye-Gaze system works by reflecting infrared light from LEDs below the screen to track movement using infrared cameras. Kind of like reversed Wii Remote, in a way. Essentially this can track where you're looking at the screen to within 5mm.