Your comparison makes no sense as the Wii comes bundled with motion controls 100% of the time for less than the base models of the other systems without motion controls.
Also, the Sony nunchuk (navigator or whatever) is expensive due to wireless and it has a built-in lithium ion battery.
Finally, this comparison has been done to death on this site with far better arguments. What it always boils down to is that the MS/Sony approach is FAR too expensive to gain new users from the more familar and cheaper Wii setup. The only people that will buy it are going to be existing owners for the most part.
What's going to be far more important is next generation. What is going to be shown in 2011 for release in 2012. Will these motion systems for MS/Sony show enough sell through to warrant them being primary or immediately bundled products with some minor changes?
