The best 2D TV's are also 3D TV's, so there's really no point in ruling out a 3D TV because that's going to also rule out the best 2D TV's.
That said, OLED is coming...plant that can do 65" screen will be built in 2H 2011, maybe large screen product in very late 2012 or 2013. Now, when affordable (to the family that makes say $60k combined a year) OLED TV's will be coming, that's likely out in the 2015-2016 timeframe.
This all sounds so far away, until you consider that "affordable" OLED is anywhere from around 4.5 years to 7 years away: That's not that long.
Basically, unless you absolutely need "the best" and/or really have cash to burn, just get something that is going to hold you for the next 5 years or so.
Even the 2011 TV's are still not going to have all the issues corrected with each brand. We'll be lucky in 2012 if there's a top TV that can finally match the 500M/600M Kuro's for black levels, and luckier still if it can match those during the day (instead of a dark @ss room).
Anyone with a halfway decent TV right now would wait until the 2012 models came out, and buy that top set. Then wait the 4-5 years from then, save up, and finally buy an OLED display when they're out.
Chuck