It has always been a casual platform, that was many peoples criticism of it; there were no killer apps for it. No 'hardcore' games either, it was left to developers who were too wary to make anything for fear of not reaching an audience because none of the market that would like the game had a kinect because it was all casual. I honestly don't see how the implementation in hardcore games even does anything either, I think they're all just voice commands, and these could be done with a headset like in EndWar and all rainbow six games. It's a bit of a con and a shame at the same time as the tech is great (conceptually at least, I don't own it).
A god game sounds like the perfect fit, but more than that I'd say most strategy games or turn based games would work wonders, the latency problems or lag whatever aren't present due to either natural pauses in gameplay or slow pace negates the difference. For example, I think XCOM would have been the perfect game to use kinect. You could manage the base minority report style, and move troops through either saying grid co-ordinates (which would have been put in) or moving them with a wave. What a waste of an opportunity. They should also try some other PC type games, like total war, managing the map screen, then waving troops around again - it would be hard to implement but the point of kinect is you are the controller, so you only need to gesture or move your hand to a designated prompt to do a button input, the small amount of buttons on a controller problem gone and move a camera with more accuracy meaning PC games are playable?
Not realised the potential at all mr walrus. I've suggested two imo simple, brilliant ideas that I'd buy a kinect for, and I've got no idea about making games.
It's all in the game...