Realistically speaking,I think the only face-off worth a look at this generation is aftermarket overclocked 780ti's versus 290x.Something like Classified and HOF versus the Toxic (Or Vapor-x) and Lightning.These are the cards enthusiasts/gamers will mostly buy,not reference ones.We'll be able to compare without worrying about throttling,overheating and performance fluctuations.Bring it on AIBs!
Thing is,both the 290x and 780ti have quite more performance than 99% of the people that will buy them need.I won't need my 290x for 1080p gaming,but who cares?