Nope, the guy (Nvidia CEO) was talking overall performance as far as I know:
(skip to 3m40s)
The crazy talk was things like "GTX 1080 is faster than 980s SLI", that WAS about VR
I really doubt the 1070 will be more than 20% slower than the 1080, but we'll see. Looks like insta-buy for me.
I think it'll be real close to that.
You can take the 6.5TF (which insinuates at least close to 'real' 1700b), you can take 1080's real boost (~1860/1886/1898mhz) which insinuates somewhere slightly over 1700mhz boost, or literally one or two steps below 1080's rated boost clock (which 970 was similar compared to 980)...etc.
You could even take the ratio of units disabled from the TDPs (150w/180w), subtract the ~20w for ram....and all come to the same rough conclusion.
It'll probably be faster than 980ti (both 'stock' and overclocked) by literally just about the smallest margin possible. Like you said, ~80-83% of a 1080 sounds spot on imho.
For me though, this is actually insta-wait-for-gddr5x-P10. It's really a MASSIVE disappointment.
That said, so is 1080. The fact it seems to cut off it's clock scaling (limited by TDP) at 225w conveniently to short-shrift general 4k60 gaming performance is a gigantic nvidia-style middle finger to the gaming populace:
"You will buy this because it is the best available, and then you will buy the next thing that is overpriced to do the thing the last thing should have. Then later we will re-release the former thing doing what it should have in the first place"
Sure, sure...you can buy a $1000 2x8-pin card in 3 months (or whatever) when they eventually come out, but that kind of defeats the purpose of the card, doesn't it?
Both the reviews AND the 1070 specs lead me to wait for P10. I still have complete and no-proof hope P10 will have less PPC than 1080, only slightly higher than 1070, but perhaps clock similar to both while having similar compute to the former and general gaming perf to the latter.
Is that optimistic? Maybe...but one can hope. Xfire for the price of a 1080 (while actually getting the perf I want) would be A-OK.
Worst-case, there's always Vega and/or the eventual cheap iteration of GP100 (perhaps 52 units?) which will probably give me what I want for a similar price to 1080 before not too long.