You mistake me. By being media centric, I don't mean to say that it won't have it's core focus on games. Imo the PS3 was also quite media centric, Blu-ray, large HDD, great DVD playback, iPlayer, ITV player, 4oD player, PC streaming etc etc, but it's main focus was still games.
All I'm saying is that this time around, Microsoft will likely put heavy emphasis on non game related features too. UI, OS, cross platform (PC/Mobile) related stuff, Windows apps, Kinect, etc etc. I still think that's why they've taken a hit on memory bandwidth in order to secure 8GB DDR3. A large amount of GDDR5 ram being wasted on the OS would have made no economic sense at all. And using both types of ram would have been costly and complex.
I guess we'll have to wait and see. But I doubt it'll matter much, because from what I've read and heard, Microsoft are going to come guns blazing with the games. One or two of the games they have lined up are sure to have a few patient fans brimming with joy.
I'm not asking you which games they are, but do you know for real or are you just speculating?