Oh, this is indeed a nice feature! Plus real two player side by side dancing. They really know how to play the gimmick part well! :-)
If I should happen to go for Kinect these days, I would probably give both a thorough try and then see to it.
Or maybe eat less and invest the money in both so you'll have quite the exercise and restrained from eating too much. XD Because jpop has its coolness too! :-)
Well, to the point article which details all of the important points. The looks on Dance Masters are really something else...the mood pretty japan pop like and so you're right, it might be not as accessible for most west gamers.
If you get Kinect, both should be in it. Question is, all at once or which one to buy first. I myself would go with Dance Central first and then up the voltage with Masters. :-D
Well, where I would agree, that Wii + Motion Plus might be the best alround motion control device (reasons are stated above elsewhere), it lacks a certain fire power consolewise.
That's why my points go to the PS-device. Natal looks kinda nice but I'd need a bit more to see, before I can really judge it (some of it can indeed be done with a cam, but we'll see).
It's good that this other dimension of gaming is being explored.
After beaten them online via "The Fight" with Move, you go into second round boxing. :-) It's a new age...