...of course the average user wouldn't be able to use the Wii Edition. However having such an option for developers who do understand it and can actually use it is the target audience (Xbox 360 Edition?). It's no different than Quest3D's higher priced editions such as the Virtual Reality one that costs close to if not exactly $10,000 vs. the much lower priced beginner's editions that cost less than $100(used to I think) to a few hundred. The average user isn't going to slam down 10 grand, however there are those that will if they have a serious project and financial backing of some sort.

I suppose Xbox360 would be the more ideal choice given its relationship to Windows and DirectX. Of course, getting the game made and getting approval from MS is another matter all together. However, if the game is good enough, this may not be a problem; thus the serious developer vs. hobbyist, weekend warrior.