XBSX 4K 120hz on Samsung Q80r. It's there but not there. 4K TV Details option shows it is capable but Samsung needs to step in with a Firmware update. : r/XboxSeriesX
Samsung Q85R (QE55Q85R) 4K TV review | Trusted Reviews
Samsung Q85R 4K TV review (QE55Q85R, QE65Q85R, QE75Q85R)