Microsoft is really freaking out about this but I don't think many people will buy it to not use with an xbox. I don't think it will be used for games more than experiments, robots, stuff like that. Who is going to make a game for this on some other platform? If the games are popular enough maybe it can be used for emulation years from now but I'm thinking it will be a short lived fad anyway, who wants to flail around like a spasmatic 9 year old just to play a freaking game? The Wii was pushing it, but now I have to actually stand up and use my entire body? Why wouldn't your just join a gym and keep my entertainment and expertise separate. Or better yet go play a sport?
I just don't' see any incentive for anyone to make a game for this when there is xbox live that you can sell a game for this. People that use these drivers will be using them for things other than games. If you want to make a robot out of your Pandora I could see that though, that would be cool. In fact if you make it cheap enough I might make one when I get my Pandora, freaking Microsoft out.