After experiencing a QN900D which supports 8K 60hz, and seeing the ludicrous level of sharpness from a 65" TV, I'm now all in on the 8K rabbit hole.
The only other TV I've seen at that size or larger is the LG OLED77Z39LA 77 inch OLED Evo 8K (I don't know if this supports 120hz but if it does...