Not those same people. Right now a tablet is either `the cheapest computer' with appeal to low-end market or `the ultraportable' with appeal to some of the middle- and high-end market.

In a few years a tablet could well become `the powerful, ergonomic and ultraportable computer', with appeal to whole middle- and high-end market. That's the unwritten assumption behind the article: that technical progress will allow tablets to go the PC way -- decades of domination on wide market, rather than the netbook way -- cornered to low-end market, little market dynamics after few years.

Of course, Apple knows how to sell upgraded hardware to the same people every year or two -- but you can't have the whole market work that way.