Its no different from the Wii vrs PS3 arguments.
One targets gamers - the other targets everyone. The sales correspond with this.
The real issue/pity about the PSP - software sales. Considering the install base is 40m+ units - software sales are terrible. Compare the sales to the 360, which has around half the install base.
I really doubt its 'just' piracy - I think people just don't buy or play that many games on it. This is the biggest problem for the PSP - its made it close to impossible to convince publishers to really support PSP development.
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