Originally Posted by
AOD_Time
There's really no major reason to upgrade just yet. The 10xx series is a massive gain over the previous gen, with the drop in fabrication levels to 16nm nodes - but we're yet to see anything to really take advantage of it. However, one 1080 is still not enough for 4K/Ultra, or 1440p/144Hz/Ultra. SLi can be, pending the title is decently optimised.
If you were on a 780ti or below, I'd say to definitely invest in the upgrade.. but the 980 -> 1080 just isn't worth it yet.
I'd say if you're on a 980/980ti, wait for the 1180ti. It'll likely be the first "real" 4K/Ultra / 1440p/144Hz/Ultra single GPU solution that we see. We're also likely to see similar 9xx -> 10xx leaps due to the looming introduction of HBM2 replacing GDDR/X.. so instead of a 30%~ gain from 980 -> 1080, you'll be seeing closer to a 50/60% gain. And at that point, you'll be safe to sit back for a few years, as honestly, we're hitting a point of diminishing returns with graphical fidelity in games. Our hardware is getting more powerful, but consumer-facing software just doesn't have the use for it.
Now, if you're running lots of complex renders, or machine learning algorithms though CUDA.. then yes, the upgrade would probably be worth your while :) Otherwise, I'd say to hold off for the next gen!