We used to be an agrarian nation, he explained, and as a result our vehicles were largely trucks. As the USA became more urban and suburban, we moved to an era where the highways were dominated by cars, not their lumbering counterparts.
The same thing was happening in the technology world — and, with the iPhone and the iPad, the movement was accelerating.
"PCs are going be like trucks," Jobs said at the 2010 All Things D Conference. "They are still going to be around, but only one out of x people will need them."
Clearly, he didn't expect x to be a big number.