Yeah, might as well lug a laptop around, I agree. I'm not vendor bias, my smartphone is a blackberry bold 9900, chosen because of it's size and because 99% of my phone usage is text and email. My tablet is an asus transformer pad, chosen because I wanted something other than my ipad. And my laptop is a Macbook air, it's light, small, and does what I need for my job (software engineer).
My point was only that I prefer a small phone for general mobility and being out and about. If I know i'm going to be surfing the web and reading docs, I'll use my tablet. And if I'm gonna work: laptop. I have friends that spend a lot of time on the bus and love their giant screened phones..