OK, prior to this I wasn't considering buying a new Xbox, but now I am. Some comments.
2x wireless 802.11n transmitters. They are definitely serious about the connected nature of the box.
Cloud system. MMO's, already leverage gameplay remotely. Even action MMO's which includes shooters. If ALL gameplay (AI, etc.) can be run from the internet well enough for an FPS, cloud computing certainly should be leverageable by game developers for small chunks of a game. Remember, unlike something like Gaikai, there is no latency spent for video encoding.
One simple thing I could think of is an open world game where a developer could have far more AI controlled NPCs to make the world feel more alive and less empty. AI that can be significantly more varied and robust due to not competing for computing resources that a game would need for actual gameplay. Gameplay affecting, no. Game changing with regards to immersion and removing virtually empty open worlds that we've had up until now? Possibly. Imagine being in New York City or Paris or Tokyo and having the streets filled with people all run by a relatively robust AI. Something that is absolutely impossible to do even on a massive PC featuring a Core i7 at 3+ Ghz. But certainly possible if you can leverage cloud computing.
Of course, anything that makes extensive use of cloud computing will need an online connection. But that's no different than MMOs which both consoles will have. As I've stated multiple times already. Both PS4 and Xbox One are going to have games that require an online connection in order to play.
Also, I'm not sure why people think Europe is necessarily out of it. What if Microsoft has a partnership formed in Europe with FIFA similar to what they have in the US with the NFL? There's nothing that says that Microsoft can't partner with internet TV providers in Europe.
Oh speaking of Comcast. People do realize that a lot of what Comcast has available is available to be accessed online and not just through a physical cable connection? Which means that if Xbox One is able to leverage that, then nothing prevents something similar with regards to TV in Europe, Asia, or wherever.
Also interesting that Xbox One actually does have multiple OSes with each running in its own VM.
Regards,
SB