Bossyfins :
Titan X is already out.. It litterally kills everything, and even handles all games on 4k at ultra... at like 70+ fps.... As soon as MSAA is enabled, it goes to lower 60s, but its 1000$... Already confirmed with NVIDIA... In terms if 390x, they may be similar, to it will blow it away... Idk though... AMD has to release it soon,...
Not quite.
The Titan X I would still not consider a "true" 4K card. It isn't there yet. What AAA title (most of which are unoptimised trash) can run at Ultra at 4K with 70+ fps on a single Titan X? None that I can think of, besides Bioshock Infinite, which is visually sub-par and pretty outdated - it's nearly two years old.
Check this out:
https://www.youtube.com/watch?v=9BEdK5R-VAs
It is an extremely powerful card, but really is not that much more higher performing than the 980. A two-way 980 SLI will still have it's issues at 4K, without adding scaling and graphical issues into a mix. I have not seen four-way SLI numbers for the Titan X, but I am pretty certain that is a "proper" 4K setup. Anything less than 60 fps on average I would say is not satisfactory for whatever given resolution. In this case, the Titan X (as seen from benchmarks) pulls less than that the majority of times. At 1080p or 1440p, it is completely satisfactory.
4K gaming has become a closer reality with the Titan X, just like it did with the release of the 980, but we still are not there yet.