Quoteno OLED, G-Sync, or Thunderbolt 5 options
I noticed (much) softer/worse image quality when HDMI VRR was enabled on my OLED TV, connected over a certified HDMI 2.1a HDMI-to-HDMI cable (so the cable is not the issue). Also I think the input lag was higher enough so that it is maybe noticeable, I feel like even if it was just a few ms? it was quite noticeable. Wonder if it would be the same case here.
But not having OLED with its sub 1ms pixel response times is an issue indeed in the sense that: With pixel response times of 11.7 ms and 18.8 ms, the "120 Hz" are true 1/0.0117 = 85 Hz and 1/0.0188 = 53 Hz. Awful. (IPS displays with the required 8.33ms pixel response times, for true 120 Hz, do exist (and much faster ones still))