TrackIR is Next in Video Games
The next wave of video games will track your facial movements. You look left, and your character will look left too. The video decribes, "The TrackIR4: Pro is a head-tracking device that works by detecting infrared light reflected from three IR-reflective surraces on a 'TrackClip' that can attach to a hat, headphones or similar. The device tracks head motion in the full six degrees of freedom and translates it into game controls."