Should the PSP be viewed as a succes or a failure?

[Bodhesatva]

ckmlb said:
I don't think it's logical to say the PSP didn't get some customers that would have formerly have bought the Nintendo hand held if there was no other option.

 It's completely ridiculous to claim otherwise, in fact. Does anyone believe that the PSP didn't steal a few customers from Nintendo? Literally 0, or even close to it?

Nintendo may end up selling more DSes than GBAs simply because the handheld pie got bigger, but their slice of that pie was reduced proportionately.