Oh, I don't think there's any doubt you can do some pretty damn cool motion tracking if you throw enough processing power and video resolution at the problem - and both 360 and PS3 and their respective cameras are certain to have enough of both.Shifty Geezer said:There's also the question as to how well the PS3's Eyetoy could handle such games (and XB360's camera for that matter).
The difference of course is that the Wii has motion tracking AS STANDARD, cameras for its competitors are peripherals, and 360's cam launches like 10 months after the main system while PS3 cam is MIA still and has no date whatsoever. Games that require peripherals don't sell all that well in general, and the cams are certain to be fairly expensive - 360 unit is estimated at what, $75? That's like 1/3 the price of an entire Wii system!
Also, Wii's MEMS devices require far less processing power than motion tracking through a 2D camera input stream, ensuring the price will be a lot cheaper, and giving a much smaller, quieter, cooler-running system overall.
There will be many more games for Wii featuring motion tracking than either 360 or PS3 can hope to dream about. PS3 controller has MEMS too of course, but it's designed to be held with two hands, which limits its practical applications. Aiming and such pretty much has to be done via camera motion tracking, unless Sony releases a MEMS-based wand of their own that is and then that is just another periperal as well.