[orbital-decay]

> I don't see how the TV can compensate for the burnin without having an external picture of the screen.

Build a comprehensive degradation profile of your LEDs. Keep the burn-in accumulation buffer that tracks intensity and usage amount of each subpixel. Use it in your EOTF to correct the picture.

Some color-accurate monitors like Eizo are even profiled for temperature (and have a grid of temperature sensors)

[empiricus]

sounds good in theory, but what about gradual errors accumulating after thousands of hours/millions of frames?