In fact the ultraportables are important to this story. They are the real incarnation of what Bill Gates thought the Tablet would be. His 2001 forecast that in five years the Tablet would be the dominant model on sale was wrong. But I'll pick up his wonky prediction cap. I think that it will be true of the ultraportable in five years or so; in 10 years, surely.
And I think that ultraportable, like the Android phones, will be running Linux, because there's a lot of effort gone into developing low-power versions of it already.