I just read the gamasutra article and I think the topic is misleading :
consider the example from the article:
"...How does it compare to the rest of SCEA's hardware lineup? "The PSP, from a handheld perspective, it's more of a 13-17 year old [demographic], multi-ethnic, a bit lower-income as well. The PS3 is still in its early adopter phase, tech-oriented consumer... they're interested in the multi-functionality of the system..."
the rest of the article talks about demographics and who exactly is possibly buying the system. which i also think is off myself. I know people who own a ipod, ps2, ps3 and a psp.
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