Using the spoken word to communicate what makes a Kinect game more fun than a non-Kinect game is an uphill battle. For one, it's not terribly easy to find someone in the gaming press that likes Kinect all that much, and if you do, they may not have more to say beyond "Movearaoundalot! Movearound! Goooooood!"
Microsoft's Kudo Tsunoda has an interesting approach on to explaining what makes Kinect so great:
If you think about a game like Mario Bros., would you say Mario Bros. is a core or casual game? That's exactly what we're doing with the Kinect products. ...But if you look at River Rush, from Kinect Adventures, that in a lot of ways is like a platformer game. It's all the same things you see in platformer games. The way you summed up how you would feel about Mario Bros. is exactly the way we look at the Kinect games.
So Kinect games feel exactly like Mario Bros., Mr. Tsunoda? Exactly? That's totally weird, because most of the games I've seen for the thing look more like Wii Fit than anything else. Not that there is anything wrong with that -- I'm just saying that if you're admitting that your games are exactly like your competition's games, you might as well make sense while you're doing it.
Microsoft likens Kinect experience, games to Super Mario Bros. [GoNintendo via Videogamer]