There were actually two separate presentations by Sony during the reveal of the Playstation 4: one for developers, which might have been better situated at a GDC, and a second presentation which showed incredibly high resolution videogames in various states of undress. Predictions were verified, or sundered, by virtue of their truth content. The bump to eight gigs of ram was clearly a recent addition, and there's a lot of gesticulation toward the more "wibbly-wobbly" and "timey-wimey" aspects of the backend. By the end, though, they showed a machine that was exquisitely tuned to this particular nanosecond.