Looking quite a bit different than the original model, this mockup seems to abandon the original curves. On the rumor spec list is a 1.5ghz dual-core SnapDragon S4 CPU with a 4.3" Hi-Def display. Of course it will be Playstation certified as well.
We're a little concerned by the capacitive buttons, as they may be indicative of Gingerbread running on the device. However, if you had the original model this should be a major step-up. Improvements like a dual core processor should make a world of difference in the gaming experience.