Yes, yes and yes.
IB, Trinity and Kepler, as Falconet said. Also expect 7700 and 7800 GPU's from AMD between now and then.

Why wait?
More to choose from and better choices, reduced prices of present options, increased future proofing for the newer technologies, improved performances and lower power requirements relative to performances of today (also means less noise, better life expectancy).
There is no point buying a GPU for WCG until you know which one to buy, which we won't before these cards are tested, and they can't be tested before they are released (well they can but the testers can't publish their findings). Will GCN be important, PCIE3, Physics, different ranges, what will be the best GPU in terms of value for money at different price ranges or performance per Watt??? I don't know so I'm not guessing what hardware to buy!