I will now say in all cases if you want a 2.1 TV then wait til 2021, there are so many problems across both panel types and the brands that support it. Maybe this is why Sony didn't really go in with VRR/2.1 features as much as Samsung and LG.
* Samsung & LG have the VRR Gamma issues in 2.1 + Sam only massive PQ reduction in game mode + LG problems with Chroma subsampling in 4K60/120 HDR.
* Sony has the image quality reduction in 4K@120hz
I still think a Sony OLED is the way to go for best image quality + motion but it seems suboptimal not to wait til 2021 for more sets with 2.1 in them, the gaming features of LG OLEDs and hopefully with these VRR issues worked out.
We are constantly hearing how C9/CX is the best TV for gaming because it has VRR and lower input lag. Except the VRR doesn't work properly and there are HDR gaming problems. IMO, for people playing at 30 fps singleplayer games a reduction of input lag of <10ms is imperceptible given the total other lag introduced by the engine, controller and other factors.
I will include this video of Spiderman running at 60fps, they captured the game at its PS4 framerate of 30fps and then used an offline framerate interpolater to increase the effective framerate to 60fps, if you don't notice any video artifacts (tearing, morphing, wobbling parts of the image when they move fast, clear "jelly" borders around objects moving) with this video then you don't need to worry about the image quality/motion being better on Sony OLEDs, but that does still leave the problems that are mentioned above: