Dunno about how long it'll be on the market because of the whole PSP-4000 or PSP2 rumors for this year?
But I would have to guess and say that PSP should be able to hit 70 - 80 million, fantastic number, the PSP is the first ever handheld to actually somewhat compete with the a Nintendo handheld.
Sony's next handheld might actually be able to top Nintendo's next handheld.







