I didn't see it before the article, and I still don't see it. What is so revolutionary about adding Kinect to a video chat? The last video shows that it can (

I didn't see it before the article, and I still don't see it. What is so revolutionary about adding Kinect to a video chat? The last video shows that it can (somewhat) detect who is talking and react to that... But unless you're walking around your house and the video can pivot to follow you, I don't see any real use in that.