[jacquesm]

Very hard to compare two worlds (mobile and 'immobile' computers) without taking into account that the one is brand new and people seem to want one (and there is a very large push to own the latest and greatest) and the other is simply mature technology that works until the hardware dies. It's obvious you're going to sell more of things that sit in peoples pockets that replaced their previous phone, something they were doing with some regularity before smartphones appeared.

Smartphones and tablets are interesting, they may enable new applications, they take over some of the functionality of desktops and laptops but it's more of a continuum than a very strong difference, you go from small and on your person to phablets (what a word), tablets, laptops, touch screen all-in-one PCs, regular PCs all the way to servers.

So mobile simply completed the spectrum and as long as there is a fashion element to it they'll be sold in very large numbers (the fact that the batteries die is another push to upgrade them, ditto laptops).

In the longer term it will slow down a bit but mobile phones will always be sold in larger numbers than desktop computers because of these reasons.

There is one way in which 'mobile is eating the world', which is in terms of resources consumption, and that is going to be a real problem without better and more structured ways of thinking about disposing phones during the design phase as well as some kind of rebate program.