60 Hz judder fix coming
There's only so much they can do. They can fix it for full screen 50 hz, and no doubt make a 50hz compatible dash for overlaying elements on 50 hz video (and both of these things would be good), but any attempt to overlay 50hz on 60hz will result in judder (though most won't want to game and watch telly at the same time).
24 fps DVD and Blu Ray will be much better at 50hz. Might actually be a viable DVD and BR player if the fix is good enough.
Microsoft say Kinect is indispensable for Kinect. In other words, there won't be a Kinect-less bundle, which imho is the right thing to do.
Then they'd better be prepared to bleed for a couple of years while Kinect picks up momentum!