I agree this is a great feature which has saved me much frustration with the Xbox One. I've now completely disabled the Kinect automatic sign in because it basically never worked for whatever...
It seems like plenty got re-written and not all for the better.
On WP8, the system would remember the audio levels of different connections - ie it would remember that if I was connected...
The Kinect is an IR blaster.
You had me at "standalone podcast app"
DLNA doesn't support encrypted content, so either you have to hook the computer up to the TV, or use something like WiDi.