johnwhelan -
It depends very much on the content you're looking at.
And you are absolutely correct in that statement too.
Like you, I can easily find poorly-designed assets on the DLS with high polys and zero LODs and bring even a mighty 1080Ti or Titan to its knees.
Despite my high-performance gaming machine, I take great pains to eliminate such performance-hogs from my routes and sessions in the interests of attaining exceptional smoothness and consistent framerates.
Latest intel on the next-gen nVidia cards (based on leaked emails to OEMs) is that there will be product launches on the 30th August (GTX-1180) and again in late September (1170 and 1180+) and 30th October for the 1160.
Actual availability in retail channels will be considerably later, but since there is a glut of Pascal era cards in the channels right now, expect prices to drop further as attempts are made to shift stock ahead of the new 11xx GPU launch.
The bulk of crypto-mining has shifted away from GPUs to specialist ASICs for the time being and is becoming somewhat unfashionable, so expect that there will be plenty of unwanted GPUs in the marketplace.
It will likely be some time before the Ti version of the GTX 1180 is delivered (probably not until the end of the year, in fact) if the past pattern of GPU tier launches is repeated - (i.e. 1180 and 1170, followed by 1160, then 1150 variants before the Ti version of 1180 drops).
Intriguingly, there's also mention of a 'GTX 1180+' variant in that leaked email to a channel partner and much speculation about what that actually represents if it is not simply a typo.