Not sure if this post is early, but the way I see it, you have the business model of Sony of going with a console in the more traditional sense (adequate performance, services that are an evolution of what is available now) vs Microsoft that is going for a lot PVR stuff and the cloud service.
I just highlighted in the other topic, that I don't think the cloud service will be effectively used to enhance the weaker hardware, but to offer new gameplay possibilities. Offer persistant worlds - worlds that change and stay changed and to offer places on a grand scale where players can interact with each other (or not) in a shared world kind of thingy.
This might not work for every type of game, but if most games would offer such an environment and say Sony couldn't offer something similarly (because they don't have a cloud infrastructure), I could see how Microsoft could offer very attractive gameplay possibilities that is tied into their cloud service. It would make comparing games difficult. Who is to say that the potentially graphically slightly better games (PS4) would be better than the slightly less sophisticated ones on Xbox but with a persistant world you can connect to?
I'm as much awed by great graphics as the next guy on here, but persistant worlds in many games would IMO sound quite exciting.