This Titan has cores disabled so it's highly likely that The "Ti" version will be slightly better than this in specs and the full fat chip will be better than that, Maybe something like the Titan X Black.
It's highly unlikely we will see another Titan Black type card unless Vega is very good.
Quick explanation as to why, from my mate in Taiwan.
OK basically making "full fat" dies is incredibly tricky. It means that basically you need absolutely 100% of the manufacturing process to go perfectly. This is hard enough even on small dies, but on larger ones it's much harder and much more costly.
You are only seeing this new Titan X because Nvidia are making a Quadro or Tesla card that's basically identical (even down to the fact it has no DP) however this Quadro or Tesla (I can't remember which) is full fat. So what do you do with all of the failed cores? you basically make a new Titan X.
Therefore the 1080ti if it were a full fat card would cost more money to make than a Titan X. We all know how Nvidia like getting paid for hardly anything so I really can't see them going to all of that trouble just to make a card that's more expensive to make yet they would have to sell for £300 less.
We only saw the 780ti and Titan Black because AMD released their 290x which was faster than the original Titan and the 780. Nvidia were not happy about this so they decided to make the TI and Titan so that they could go back to charging stupid money for the Titan. Who is going to pay £700 for a Titan when they could get a 290x for around £450 that is faster?
So they made the Titan Black which was ever so slightly faster than the 290x (but still faster) and bingo bongo ! you can continue to charge £799 for it.
So yeah, all depends on Vega. If Vega is slower than the new Titan X we will see a 1080ti that's the same (though probably with less VRAM) or worse than the Titan X. They'll only stash the full fat in reserve in case AMD sneak up behind them and pull their jogging bottoms down.