but in terms of generational leaps, for 780/780TI OC users, that's not amazing.
I agree. But I will say, If the GTX 880 has anywhere near the same overclockibility as the GTX 750 ti, that 30% could become 50% after overclocked with bios tweak - volt mods.. .etc..? Also the extra 1GB of vram could also be enticing since games like Watchdogs are using it. To me it would make a worth while upgrade if I sold my current card to help fund the new one.