Not everybody is a tablet PC user, as I found out on my flight during my vacation. There was this gentlemen who had a tablet PC, and for the duration of the 3 hour flight, he kept flipping the tablet PC so that it became a tablet and then a laptop. He spent more time switching then actually doing something productive with the machine.
Maybe it was just this particular machine, which seemed bulky. Maybe tablet PC's are as good as Scoble says, just not this particular one. Anyways, this guy was really fidgety as it is, and while I tried my best to get some sleep on the flight he kept moving and squirming in the seat next to me. Man was I glad when we finally arrived at the San Hose Airport.