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.
Luckily no one does by anything but Nokia anymore! But certainly they've been a big big part of the excellent 2013 for Windows Phone.