I do like the Reality Creation set to Auto for PS4 Pro and PC games, it helps a lot with the unwanted blur from upscaling. I think it does introduce a bit of lag, so ymmv.
As far as settings, I just use the ones from rtings for Tv Viewing and Gaming, though I've changed from Expert1 to Warm. Just was a tad too brown for me. And I adjusted black level a bit.
Black Level: 45
Auto Local Dimming: Medium
Xtended Range: Low or Off, usually just leave it on Low
2944 x 1656 @ 120hz was the highest I could get the TV to recognize through Nvidia Control Panel. But the 120hz image the Tv produces isn't that great for some reason. Some games do look ok though, like Borderlands 2 and the Pre-Sequel. I recommend just leaving it set to 60hz. Messing with the 120hz + windows 10 + in-game settings, it ended up being a headache that wasn't worth the results.
I just got a Yamaha SRT-700 TV Speaker Base for cheap from Newegg, they had a sale and it was +60% discounted with a code from their email flyer. Definite improvement over the factory TV sound, which I'm not a big fan of.
If anyone could recommend a better controller for the TV, that would be great, thanks!