Apparently you can use the remote and sensor to get a 3d style game. While the sensor is mounted on a pair of goggles, you move and the picture moves. It controls how far away, close, up and down in comparison to the screen. Giving it a 3d effect. However this only works for one person...which seems kind of lame to me. But cool tech anyways. Check it out on youtube. http://www.youtube.com/watch?v=Jd3-eiid-Uw Headtracking technology at its finest.
Yeah, it's kinda like having something like a web cam attached which tracks movement. I'm sure Sony will "steal" that idea soon too
FYI, the aforementioned video has been getting discussed in General Gaming. http://www.assemblergames.com/forums/showthread.php?t=16664 -hl718