Isnt the Kinect requiring game + Kinect indicitive of the Xbox360 Kinect using market?
Its not like people are going to buy GAMES without an Xbox to play them... The only way you would have a problem is when people purchase their initial Kinect without games from one location then buy games in another.
Anyhow, as far as I can see, MS basically used reverse psychology to get a bunch of smart people to do their work for them.
a) the Kinect makes money for every sale. It ISNT being sold at a loss. (Non Xbox users = larger market = more market share in a possibly new niche in the movement controlled interface)
b) Theres no such thing as bad publicity. Especially if its just playing into the existing MS image of we get to do what we want in terms of locking down our hardware. If it really becomes problematic, they have been enforcing it previously. If it isnt problematic, people are talking about it, experimenting with it. That can only help sales not hurt them. I mean the XBox had the red ring of death issue so widespread but how many people have you heard of giving up on Xbox as a platform? Certainly not enough to make a dent in MS' profit margin or the Kinect would have been abandoned or just kept as a proof of concept like the MS surface
c) hardware hackers will probably come up with stuff MS hasnt thought of. aka new uses for the Kinect.