Three things on that list weren't even covered in the revelation today...
Anyway, you should get round to watching this Danny. Some fo the features are awesome. The way they have reinvented Kinect is fantastic, and since you're an American sports fan (and maybe fantasy league?) then they will 100% appeal to you. The games they shown look real good on the new Xbox, and I doubt overheating is an issue. Overheating isn't even an issue on the new Xbox 360 (slim quiet one). Also, Xbox have gone from 15,000 servers to 300,000 servers, which was more than enough to power the internet in 1999. Basically, things are looking great so far.
The disc thing might be a pain, but they haven't confirmed anything regarding second hand games just NOT working yet. I'm sure we will find out more at E3 in a few weeks time, as we will with the new games coming to Xbox. You can also control TV with Skype just by voice control, and switch between TV/Xbox/Internet/Whatever instantly, without changing wires/ports/outputs etc.