The Kinect For Windows blog announced that the update available the new version of Kinect, output for the Xbox One, would be available for next summer on Windows 8 (to confirm for compatibility Windows7).
To use Kinect V2 on your PC, the sensor will require a USB 3 connection and will benefit a specific power.
Note that the Xbox logo has disappeared to be replaced by a single LED. The price is not yet announced but it would be interesting to know!
The first version of Kinect had allowed some nice experiences to some developers on PC, it is hoped that this will continue with this new generation.