The momentum wasn't just hardware sales. The PSP lost the momentum with games as well. For one thing, GTA LCS sold well, but it did not tear up the charts like the PS2 games. It sold very well in the long term, but one consistent standard of stupidity of the gaming press is to only care about the first few weeks (note how they don't like to talk about MK Wii outselling GTA IV). So the PSP games weren't tearing up the charts, and some DS games were starting to do so, including the media darling MK DS, which allowed the ability to just race to the end, so they could play it like a "real" racing game, and not have to bother using the weapons.
A flashy-first game is awesome when it comes out. A great-first game is awesome forever.
Plus, just for the hell of it: Kelly Brook at the 2008 BAFTAs
