Be careful what you ask for
Well, first of all, Kinect delivers everything it promises. It is great for family and party fun. But don't be deceived by the marketing, it is still extremely immature. There is not a single game that can satisfy a regular gamer, let alone a hard core one. They are all in the neighborhood of first generation cellphone games, just with better graphics (I own the best rated 8 of them).
There is a great potential in Kinect, but it is not here yet... So you might just want to wait.
And for us Asians, it needs a huge space, especially if you want to play with a friend. You might even end up dedicating a room for that, because you need a big space with nothing cluttering (which we call "furniture") in between. Honestly I could not even use it with my 80" projector because I needed to move out everything in between every time I wanted to play, and it gets annoying after a while...