My predictions that are based on 100% speculation:
1) Won't happen. Apple is clearly backing thunderbolt and purposely ignoring USB 3.0. Don't ask for reasoning, it's just the obvious direction of the ship.
not necessarily since that both aint competing techs.
2) Won't happen. It's already the same resolution as the base 15" MBP. Any higher and the pro won't seem so pro anymore. Unless of course they update the MBP to an even higher resolution display. Even then, I don't see them changing the display in any significant way until a major revamp. I think they will make the MBP more 'pro' before upgrading the MBAs much.
there are rumors about the intro of retina displays in the mac world, aside the ipad and iphone
3) This better happen, I bought a 4GB 2011 MBA but my number 1 concern was RAM. It barely squeaked by in 2011, it will not squeak by again in 2012 or 2013.
I do hope so too, since that I want to grab a mba next year or when haswell comes out, since I dont anymore the cpu performance of the mbp