Microsoft Just Improved the Xbox One's Graphics Powers
The first thing is a graphics driver Microsoft calls a ""mono driver"", which is totally optimized for Xbox One. Most of the devs have adopted it, according to Microsoft:
You start with the base DX driver and you take out all parts that don't look like Xbox One and you add in everything that really, really optimizes that experience. Almost all of our content partners have picked it up now.
The clockspeed on the processor has been ramped up from 800MHz to 853MHz, which is a nice little. The early analysis of what the theoretical maxes of both systems already had
the Xbox One in the same league as the PS4
As important as they are, differences in graphics between the two systems are probably not going to be an issue that causes most players to enjoy a game any less so long as devs optimize for framerate (and it's hard to imagine them not).
Nelson and Whitten also talked a bit about the matchmaking and reputation systems, which will match you with people of like skill and trollishness, and from anywhere within the Xbox. There isn't much new news on those fronts, though. Basically, the internal beta is at full steam right now, and it seems like Microsoft is being openminded about how what the X1 needs to improve.