The problem is that 780TI suffers at resolutions higher than 1080p. Its 6-7% faster in 1080p but is equal at 1600p or higher resolutions. 3GB just isn't enough with full AA, 4X or 8X. Moreover, R290x still lowers it clock even at 55%fan and Ubermode. So 780TI's victory is pretty narrow 3-4% average. well c an updated review of both cards with non-reference coolers soon.I'm sure with their 512-bit bus they will do fine at higher resolutions.
Personally just think that talk about 4k is still very premature.
In making their decision, people should stick to what matters now, and realize $300 is a lot money and they are not using 4k.
I find people bringing up non-important points for the sake of arguing pointless.