At least as I've heard John Gruber tell it, Christensen at first thought the iPhone wouldn't be disruptive because he saw it (as did most) as high-end phone, ta

At least as I've heard John Gruber tell it, Christensen at first thought the iPhone wouldn't be disruptive because he saw it (as did most) as high-end phone, targeted at high-end users. What it really was, he later realized, was a small, cheap computer. Now iPhone-style smartphones outsell PCs.