I think too many people are taking the wrong view on this thing. Kinect was never meant to take the place of the controller, although the controller has always been the biggest failure in gaming history.
Kinect is in its infancy, sort of like a child trying to learn to walk – still very crude and as of yet it's undecided whether they are going to put the resources into it to refine it. I believe Kinect was mostly meant for some very slow-paced games but mostly for games like kinect adventures, or exercises, sport's but I personally don't really believe it was meant for really fast-paced action games. So I don't think you have anything to worry about. To give you an example, my great-grandson asked me today when I was going to get a game that was not kinect! He doesn't like going through the process of getting the kinect to recognize him.
They also don't have an image lock – meaning someone walking through the room will confuse it and if you are in a critical place – you will die – believe me, it has happened to me three times – smile.
I don't look at it as replacing the controller – I look at it as the endless possibilities that it does have and can offer us. It's just another avenue of entertainment.