I think that the implicit "If you're not using it for business, then it's a toy" aspect of this poll is insulting. If you're using a computer to:
1) Keep connected w/ your family, friends, etc.
2) Keep informed (news, wikipedia, etc.)
3) Educate yourself (on-the-fly research on any number of topics)
_and_ 4) Entertain yourself
is it "merely" a toy? If so, here are other things that are toys to the majority of the American populace:
1) Any other cellphone
2) Your landline phone
3) Your computer
4) Your TV & cable service
Just because you might occasionally use those things for "business" doesn't justify the other 95% of the usage which is basically for entertainment or "keeping in touch".
And, as for the "can't you just use your computer for that?" questions: I _am_ using my computer. My iPhone is a computer, just a handheld one.
This just seems like a silly argument to try and trivialize the iPhone purchase that other people have made.