Wait wait fish bait.
Nvidia are dragging their heels on Pascal. The 1070Ti says it all. They have no intentions of releasing Volta any time soon. A friend of mine is a freelance journo (he recently left Asus) and he explained that Volta is very, very expensive to produce. It's nothing to do with desktops, but all to do with them keeping Pascal in the desktop market so they can keep Volta in the workstation/server/deep learning market for as long as possible.
This isn't chump change we are talking here. They charge thousands of pounds for their workstation etc cards (£5000+) so they want to keep them there as long as possible.
The 1070Ti is a clear shout that Pascal is here to stay, at least for the next six months or so. They have done that so that the 1070Ti occupies the space (depending on however valid you saw it as) that the '56 filled. Now they have a card that beats the '56 and nestles in nicely into the line up. They would not have done that if they were about to release Volta. They would have just done what they always do, release mid range Volta, s**t all over AMD and then wait to release big Volta.
You may even see a bigger 1080Ti, TBH. They have the full blown Pascal Titan XP *and* Xp. They may release some sort of black edition.
Just remember, the mid range Volta will be about the same as the 1080Ti. They may have less VRAM though, because it's going to be more expensive. It will be a *long* time before Nvidia release a card to usurp the 1080Ti. It could be a year or more.
I also foresee prices rising between now and Volta, too. Simply because AMD are miles behind so "let the p**s taking commence !" so you may even find that the 70 and 80 series Volta cards cost around the same as the 1080Ti does now.
Dice - they are not coming out in Q1. Not from what I have been told. And besides, he still has a 980Ti. Look how long that lasted him.