I just upgraded GPU to a 2070S OC on a 6700K 4.4GHz. I was on a GTX 980 and where I was getting around 60fps at 2560x1080 on Ultra before, I am now getting 60fps at 3440x1440 with Ray Tracing set to Ultra and on the Extreme quality profile with everything else on and DLSS enabled. I compared side by side with DLSS off/on and notice with it off textures are sharper, but take a 10~fps hit. Without looking side by side I think I'd be perfectly happy with DLSS on but nVidia do seem to be updating drivers to improve dlss sharpness.
I can game at 2560x1080 on Extreme with DLSS off however and it's a constant +60fps (vsync on). In one segment a storm blew by outside with the sun setting and the light rays and sfx were sublime. I don't think I have seen graphics like this before. Ray tracing is immense!
I also browsed youtube and loads of people commenting asking what it's like on older CPUs like mine as they were considering a GFX card upgrade so I think I will upload something for that crowd.