While I do have an iPhone, I don't do much of anything with it other than make calls and text, so I'm not sure how the two compare. To me, the iPad is a lot closer to a computer than to a smart phone.

I think even a big phone will always be smaller than an ereader (or at least the two Kindles I have), and my ipad is about... 5? 6? times the size of the Kindle, so it's really a big difference in size.

And that makes sense! When I originally got the iPad, I had intended to do a whole lot more with it than read.