Needs a few more games for it is all... GTA should be the shit.
What I'm also really interested in seeing is the ability to use the wifi to pull media over the air. Apparently the psp has the power to run programs from memory stick, so it should be theoretically possible for someone to put together a media player program that'll let us attach to file/media servers and stream video to the handheld. Now THAT would be a killer app... personal wireless .avi viewer.
Mmmm... biz potential.