I disagree on the views of Kinect Sports and the fitness title. First off they are both more intense and will appeal to the mom in the house.
Kinect Sports will be Xbox Live enabled. And with full body detection will be more interactive compared to WiiSports. No more tricking WiiSports into thinking you did something when you just flicked your wrist.
Lets face it if I want to run in WiiFit the board does nothing and you need to use the motion controller to try and detect that you are running. Kinect knows your running. Kinect looks at you and sizes you up: height, body shape, etc. The only think WiiFit will have on you is a scale with the board. Far more variety of exercises will be available as well and again they can be more intense since you wont be stuck to the board.
Its libraries that sell systems not a single game.
