Actually, I live in a very mountainous place, too. All the little "nook and cranny" 400-person towns have high speed Internet now (just in the last 5 years). A weird thing is happening; in nook-and-cranny places where you can't get cell phone reception, you can find open wi-fi APs.
Nah, thin clients were a bit of a dead end. You definitely want all the computing power you can stuff into your device.
As for here-and-now can-be-done convergence, I still want a little bluetooth module that ties my tablet to some kind of high-speed data network. It should be the size of my Holux M1000 and it should come as part of a $40/month unlimited data plan. Is that so hard? Technologically, no. Politically, yes.