I think the main benefit of the Titan series over the 780 Ti is the increased double precision FP compute power, which is increased to Quadro levels. For the average user, a 780 Ti with 6 GB ram is as good as a Titan Black, so when.if we see a GTX 790 that will be the card of choice for many high end enthusiasts. The Titan series cards just don't make sense for gaming, even when 5K monitors hit the market. They only really make sense, IMO, if you use them as HPC cards doing DP FP work.