Robust Skeletal Tracking for high-performance capabilities that track the skeleton image of one or two persons moving within the Kinect field of view Advanced Audio capabilities, including four-element microphone array with sophisticated acoustic noise and echo cancellation for great audio; beam formation to identify the current sound source and integration with the Windows speech recognition API also included XYZ depth camera for standard color camera stream access and depth data that indicates the distance of the object from the Kinect camera
Microsoft have planned for a Channel 9 event at 9:30AM PST on Thursday for this release.
BTW, Kinect SDK team is on twitter. Follow them for more updates. http://twitter.com/#!/KinectSDKTeam