I don't think Sony *gets* the PSP

[MrT-Tar]

I don't have a PSP, but have often played on my cousins

No game has really made me think 'I must buy a PSP', I think that is the problem.  I owned a DS and Wii from launch, but I bought a PS3 in late 2008 after games like Little Big Planet made me think 'I must buy a PS3'