Well... so far, all of this is -WILDLY- inconsistent. Not sure why.
So let's take one title for example, Fallout 4.. @ 1080p.
One site says "we picked ultra", another site doesn't even tell us what settings they used, one site says they used ultra but switched it to 2x AA, another site says they disabled AA "No one uses AA at 1080p".
And then.. one site reports 105 FPS minimum on "ultra", another site reports 70 FPS minimum. Another site reports 150 FPS minimum, and yet another site reports 100 FPS minimum.
And despite all of this, no site can get a solid 60 FPS minimum @ 4k in any title at high ultra settings. 50's maybe, most of em 40's.. so this still yet isn't the "ultimate 4K single card" magic weapon.
So we're still relying on SLI for 4K gaming, apparently.. even with the new 1080's.
And despite all of this I've read about 10 reviews and I'm still looking for a site that doesn't just "select ultra preset and click go" but actually manually sets every single last possible setting to the maximum/highest setting, including all AA settings and then runs it.
That's what I want from games: ALL THE BELLS AND WHISTLES.
That and, even with the 900 series.. actual "Enthusiast" people, like most "overclockers" on overclock.net forums and other sites don't give a rat's ass about boost or power limits or any of that nonsense. Most of us use a custom bios, set power limit to 400%, and raise thermal limits to somewhere around 105c and then we overclock with a fixed voltage and fixed clocks. So there's no clock fluctuation and we get a steady fixed speed at all games at all load %'s, and let the cards pull as much power as they need to achieve maximum clocks and just run it up to 80c or 85c in games and clock it high.
That's how I've always done it, my 15 or so friends all do it, and a lot of other folks on the forums over there do it. If it needs 80% - 100% fans.. we give it to em, flat out performance is all that matters.
So this stupid "power curve" we can set in to cards.... I guess that's for people that don't know how to get the most out of their hardware. Hard-Core overclockers won't use it.
I want to see someone that can get 2300 mhz out of these 1080's even if they have to run 80c - 85c to do it.
So far I've found 5 different reviews that do overclock the 1080's, but all they use is these built in tools and stop at 2000 - 2020 mhz and don't try to push em further.
Also, I'm still trying to find any review that compares the 1080 to SLI setups for 980/970/etc.
Back to google.. trying to hunt down more reviews again.. it's like a needle in a haystack on review days.
Also no one has posted hwbot.org results for 1080 yet, and no one has submitted any official 3dmark firestrike results to the 3dmark website either to the public domain. So any results in any of the review sites are all subjective and may not even be true.
EDIT: Found a good review!
http://hothardware.com/reviews/nvidia-geforce-gtx-1080-pascal-gpu-review?page=1
Okay here's a good one. This one they manually turn all the settings and bells and whistles on when doing benchmarks. And when they do the overclocking tests, they throw it to 120% power target, 100% max fan and overclock it as far as it will go and not crash both core and ram.
Also with everything on and maxed, even the new GTX 1080 gets dragged down below 60 FPS minimum for 1080p in Shadow of Mordor.
Maximum clocks they could get stable were 2113 Core, max memory @ 5329 Mhz, and max temps (with 100% fan) were 65c.
And a quote from the overclocked page "While overclocked the GeForce GTX 1080 outran a Titan X by roughly 32 - 35 percent."
EDIT #..5, 6?
Here's another review that "pushes all the bells and whistles on" and this one has a GTX 980 SLI in the mix to compare to the 1080.
http://www.pcgamer.com/gtx-1080-review/
Which shows us also that at maximum settings, even with the GTX 1080, quite a few titles fall below 60 FPS for 1080p. A few "barely" hold at or above 60, at about 65'ish.
So yes.. 1080p is a viable reason to buy this card. And any review sites that don't show 1080p results.. in my opinion are useless.