12/11 will be a patch to fix current issues. You will likely notice no visual differences, but everything should work properly. I wouldn't count on any facebook changes until FB is done monkeying with the system. No sense in making things work that FB is going to change anyway lol.
I think blackmannx is right on the money. The next step is a push to get dev's to step up. I'd expect a big growth in the multimedia apps and communication utilities. Vanilla Android is always going to be smooth, speedy and bare. Android depends on 3rd parties to fill the void, and for the most part they do, but we all see ways they could do more. IMO the reason Google pushed for this to be a plain Google experience phone rather than a motoBlur phone, is so that they can showcase a manufacturer independent OS running available 3rd party software that is just as beautiful and functional as anything HTC, Moto or Sony pushes out. My gut says it will happen within 6 months, as long as the community supports the developers.