Take a look at this picture. Do you believe that this is the future Kinect 2 for Xbox 720? It shows more details (you can see the fingers) and should have more depth. Again, all these are not confirmed but the source mentioned that the information is reliable.
Here is an excerpt from The Verge.
Microsoft is working with the Durango Xbox Development Kit (XDK) and the user interface is the same as shown in the picture, according to one person familiar with Microsoft’s Durango work.
I hope they should reduce the distance of the player in front of Kinect and can see wider angle.
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(source)