With cooler temperatures, lower power draw and quiet operating the 780 TI could be a great competitor if its prices right.
I think the $150 price drop on the 780 was very much needed and it still has the 780 is a difficult position. Yeah, the build quality is better, but the performance per price is still not as good.
The TITAN feels like a useless card still, they didn't reduce the price so that was really weird, they may be discounting that card and replacing it with the GTX 780 TI, I sure hope so, because for it outrageous price it loses to the 290x in many benchmarks, especially at higher resolutions.