I just watched this amazing video. It shows how Nintendo Wii controller technology can be used to create amazing immersive 3D/VR video games. (Imagine shoot-em-ups where the aliens can be behind you, seemingly in the room with you. Incredible.) But if you watch to the end, you'll see some interesting potential for televised sporting events, perhaps. And who knows what else?
BTW, I'm told that Johnny Lee (the creator of the technique, and this video), has been hired by Microsoft to develop next-generation games for the Xbox 360. I can't wait to see them.