[rsanheim]

These exist, typically made by Panasonic or Sony, and cost upwards of 20k USD. HDTVtest has compared them to the top OLED consumer tvs in the past. Film studios use the reference models for their editing and mastering work.

Sony specifically targets the reference with their final calibration on their top TVs, assuming you are in Cinema or Dolby Vision mode, or whatever they call it this year.