A recent leak of the latest software development kit for Xbox 360 included the new Xbox Live dashboard, which rumor has it will be released on Nov. 15, and scuttlebutt has it some kind of cable TV service could arrive with it. This two minute video [hit mute unless you want to hear some reggae] of the new dashboard does not show any streaming television, but it does give a good look at how complete Kinect integration works.
The dashboard is in French but you can pick up the gist of what the panels deal with. A lot of this was covered back in June when Microsoft released a bunch of screens for the new dashboard. We just haven't seen it all in motion yet. The background also is a lot darker; not sure if that's a night/day kind of thing or something that was customized.
Xbox 360 dashboard 2.0.14448.0 XDK (Fall 2011) leaks on to the web [NeoGAF. h/t The Relic]