This video demonstrates a revolution in interaction. Instead of using a mouse, the user can use his hands and more importantly, all his fingers... Watch...
http://www.ted.com/tedtalks/tedtalksplayer.cfm?key=j_han&flashEnabled=1
... and that video shows how Microsoft built on the idea. http://link.brightcove.com/services/player/bcpid932579976?bclid=932553050&bctid=933742930
