I more or less agree with this:
Actually, I don't think we're going to see a "revolution" in the RPG hobby again, more likely it will be "refinements" from here on out.
Most of what folks have been discussing in this thread regarding technology isn't actually "revolution", but simply "evolution". IMHO, the "next big thing" will obviously be tablets, or touch-screens, or 3D rendered systems with easy player/GM manipulation; this is as inevitable in ttrpgs as it is in every other aspect of life. Certainly it will be snazzy, but it won't be particularly innovative or revolutionary, just because those kinds changes won't do much to breathe new life into the hobby.
Sadly, I'm with those who think there will be no more true innovation in RPGing beyond the tech stuff. I think ttrpgs (and their hi-tech online variants) have seen their day. Unless...
Changing the role of the GM, or possibly even eliminating it, is a very good place to look for innovation in RPGs.
...this happens. Which frankly is a trend that has already begun, in the guise of MMORPGs. I think some sort of AI could conceivably replace the GM, although not very satisfactorily, and not for quite a while.
Alternatively, there could be "innovation" of fashion (and therefore likely driven by media or marketing): ttrpgs just become "cool" again for some inexplicable reason, in the same way that bellbottoms, pogs and piercings have had their day.
The last (and, IMHO least likely) possibility for
true innovation, would be that someone devises a super-duper-fantastic mechanic that eliminates all the prep & calculation & other "difficult" parts. But such a change-- while revolutionary-- would likely result in a game as different from today's ttrpgs as Magic:The Gathering is from poker.
And like the revolutionary M:TG, this kind of thing would never become "the next big thing" unless it also rides the wave of fashion, in addition to being truly innovative.