TrackIR (head tracking device) has been in PC gaming for years now. The idea was first use for the handicap so they could use head movement for a mouse. It didn't take long before this idea was added for PC games. While TrackIR works well with flight sims, as anyone who have used it before would know, it's not as user friendly as tracking your hand. It took me a week just to get use to the device and even got a little light headed at first. The fact you have to learn to keep your head (and body) still while playing will annoy most gamers. While I like the device for flight sims I really wouldn't want it for FPS as for too much movement.
Thus I believe this is just too hardcore to make huge sales for consoles especially when it even hardcore for PC gaming. IMO long as the Wii-mote is kept simple it will help sales but when you want to do more complex things with it you will turn off all but the most hardcore of gamers.







