Dynamic 1080p 120 most definitely
I don't see this gen barely doing 4K 30/60 to do reconstructed 4K at double the framerate
but people have stated they prefer fps > resolution
I don't care if the resolution is variable, I do (obviously) hope the 120fps mode is locked at 120fps, or at least 99+ percent of the time.
I know that VRR TVs/monitors (AMD Freesync?) may help, though I'm unsure how well this might work vs Nvidia Gsync cards+monitors.
If anyone could break these things down, it would be appreciated.