I've now had a iphone4s since launch and the talk about ipad2 being too low res (well in comparison to iphone4's ret display) I find to be just silly. It looks fine. I switch between them both all the time as I have both handy and there really isn't like much a difference. Not saying that a ret display ipad3 isn't desirable but its not "too low reso" and reads like uninformed dribble
It's not dribble. A 4x increase in rez is going to be huge and impossible to go back from.