I remember reading an article when the psp was about to be released in Japan (Dec. 2005) about the special hardware features for the programming teams. It said something to the degree that the psp hardware runs things like anti-aliasing and texture smoothing so that the programmers don't have to hard-code them in the games. I'm not 100% positive on this and I forget the source (maybe playstation magazine) but I do remember reading it.