>>55
Uhh no, they are not comparable at all. The iPhone 4 has more than ten times the RAM of the PSP. It has more than five times the resolution. It has a CPU running a much more modern architecture and instruction set at triple the clock speed. It has a dedicated programmable GPU supporting normal mapping, per-pixel lighting, etc. The PSP has none of these things.
The iPhone 4 is brand new and the games already look much better than PSP. Seriously watch the video the OP is talking about:
http://www.cultofmac.com/rage-for-iphone-4-boasts-xbox-level-graphics-at-60fps/54914