Again, I get what you are saying. I guess you could output 1080p to a 4k panel via Kodi, but for me, I'm not sure it makes much sense if the media file is 1080p and sub, but, each to their own.
LG OLED55BX6LB, Zidoo Z1000 Pro (ZDMC 20.2 Arctic Zephyr 2 Resurrection), Yamaha RX-A3060, Polk Signature Fronts & Centre, Wharfedale D300 Atmos surrounds, Heco Victa Prime Sub 252A, DSPeaker Antimode 8033 Cinema