There’s quite a Theory — Praxis gap here, but her group has already taken steps along the path she proposes, and it’s a good thing for culture-makers, game-designers, and policy-makers to keep in mind.
I find it especially amusing that the "Social Fabric" she discusses runs along the same lines as the descriptions of social bonds/cohesion that are developed and affirmed by gaming (in my research’s case, it was with tabletop rpgs, a predecessor of MMOs). So I suppose I would count as a part of the “researchers have shown…”
For me, there’s two main points here — identifying that the kind of engagement that MMO players achieve is something that can be well put to work, and also the notion that by imagining our future, we can influence/create our future — which is an idea well-known in the Science Fiction/Speculative Fiction/Theory world. Judith Butler would agree with William Gibson in this, I believe.
The hard thing here is getting enough people to care enough about the games that she's suggesting that they put in the time and effort — then you also have to have a game where the result are directly applied to enact social/technological/scientific/economic change, or that the game has a direct effect on these issues/matters. So there’s a social trick (get the players), a design trick (make it relevant), and a policy trick (do something about it).
But for all the difficulty jumping the Theory-Praxis chasm, there's good ideas worth spreading here, in keeping with the TED mandate. I’ve put “Give a TED Talk”on my list of life goals, btw. Just you wait.