um...lol
free games...ya thats the best part, play games from all the other systems I listed.
Ps1 nintendo 64, supter nintendo, GBA, Sega...and atari and some more.
+ then you can use homebrew app's on the psp...like PSP wake up (i use it as my new alarm clock) some other stuff like turning your computer on with psp , and using yoour psp as a wireless game controler for your computer!
and much more.