On the plus side against the Nintendo offering, this hardware setup will be cheaper if you want to buy multiple controllers. Each Wiimote has its own camera and accelerometers. Each WM+ has its own gyroscopes (that must also be recalibrated every minute or so).
Here you buy one camera (that you can also use for other stuff) and 4 wands and you'll certainly be spending less than with 3 extra Wiimotes and 4 WM+.
As for those lamenting that you can't move your characters, what exactly holds a game developer from using a DS3 in the left hand (left analog+ sixaxis) and a wand in the right hand setup? The same holds for MS's wand-less tecnology, of course.







