Read about this Australian invention - its a remote control using hand gestures to control a TV, hi fi or whatever. But this could have potential in controlling a PC using hand gestures-without even touching the screen!!Apparently they are already talking to Sony about gaming-like wiii without a controller..
http://www.smh.com.au/news/home-theatre/lost-remotes-last-hurrah/2007/07/18/1184559833067.html
http://www.smh.com.au/news/home-theatre/lost-remotes-last-hurrah/2007/07/18/1184559833067.html