It works through identifying body gestures and can even track group interactions, like high fiving your pal. A diagram shows a camera and microphone attached to a PS3 console.
The patent filing itself doesn't limit Sony's desire to see this spread just to the PlayStation 3 console. Apparently the technology, asreports, can also detect sadness, excitement, anger, joy, interest, and even boredom.
Could player emotions help shape the direction of game progression? Interesting.