> there are some people who, because of their unusual needs, have a bigger more powerful one.

Unusual needs like being able to see a lot of text at once, type things longer than a paragraph, multitask, use more than one app in a work flow, and run real software?

I doubt it... unless phones develop dockable desktop capability in which case they are now dual-purpose converged devices. Right now to believe that mobile is "the future" of everything requires one to believe that most people have nothing to say beyond one-liners and selfies and that the only purpose of computing is to interact with canned services. That might be true for a subset of the market but I think it's a smaller subset than some do.