I don't think cell networks are dead meat. They will be, relatively soon, for anything but data carriage yes. But everything you want to get: voice, messaging, web, whatever else; you (and I) want it over the inet. They're (cell nets ops) problem is that inet access is just one product. They got quite confy over the years selling all kind of products and product levels enabled by their cell nets. Inet access is only one product, and in the long term, tends to have only one level: fast, no limitations.

That is a big problem for them I think. No room for up-sells, no room for fudging price plans. It's going to have to be fast and with no limitations or someone else will provide something that will get you closer and closer to that. And the natural advantage of having those towers is not going to last forever (think WiFi, WiMAX and what comes afterwards) so they will have to reduce their expectation and be contempt of selling plain, unlimited inet access. I'm eagerly expecting that future.