Excellent GiantBomb interview with Phil Spencer, chief of Xbox:
Video link starts at a relevant spot:
Jeff: "So when you pie-in-the-sky think about what that next box is... what's going to be the next thing in that 'we have to have this', what is it?"
Phil: "If you look at the Xbox stuff we are doing right now like variable framerate... I think framerate is an area where consoles can do more just in general. You look at the balance between CPU and GPU in todays consoles they are a little bit out of whack compared to what's on the PC side and I think there is work that we can do there."
Pretty big news. This was posted in one of the other threads, unfortunately it didn't get much attention apparently. Seems like we can expect much more 60fps games on next-gen consoles! Thanks to Wollan for finding this!