As far as worldwide sales I think it's just too soon to call either way. There's still plenty of time left of both systems being on the market and the gap between the two is not that large. And although the 360 will always remain the cheaper console, let's not forget that Playstation systems have always become mighty alluring on a wide-spread level once that inevitable $199 price comes around.
I think that Kinect will have a large reception, simply because it is new and different. Personally though I think people will realize that it may be better suited as a device for 360 apps other than games, which could hinder its ability to steal a lot of the Wii thunder as far as game development. The Move, however, has the opportunity to share cross-platform games with Wii (e.g. Dead Space Extraction) as they are incredibly similar in that regard. It's being supported by both harcore games (SOCOM, Killzone 3) and family oriented games (Eyepet, etc.), the latter of which may appeal more to the average family already familiar with the Wii experience than Kinect might. While I'm not saying it will, I think that the Move could end up proving to be the more successful of the two in the long run.
