Holy crap this has to be the coolest thing evar! Watch the video and you will know what I mean. Head tracking rocks. I just have to wonder what games could possibly use this tech.
FPS: The head movement could be used for ducking and dodging.
Boxing: OMG ducking dodging and stuff!
Ok, so I think its just too early or I'm too tired, but I can't think of a ton of applications for this tech, but it's quite cool.
I leave you with one final cool thought...imagine an entire art gallery where each picture moved like this. Sure it would only work for one person at a time, but I think people would have so much fun playing in the gallery space. Hmm...side project?