[rixrax]

I wonder if this is so 'generic' that e.g. AppleTV could add support for this? Take a photo of your TV with an iPhone when AppleTV is showing test image. And then the AppleTV output is calibrated appropriately to compensate for uneven backlight.

[bzzzt]

Calibrating color with an iPhone is already a feature in tvOS, so correcting for local errors looks like a nice improvement in that direction.

[dontlaugh]

Sadly it only works with iPhones that have FaceID.

[bzzzt]

Probably related to the quality of the camera.

[millimeterman]

There are already some companies that let you calibrate your TV's colors with your phone camera. Apple TVs do it and adjust the output signal while some new Samsung TVs can do it and actually apply hardware calibration. Adjusting for unevenness in the same way seems potentially harder but doable.

[jimnotgym]

Isn't this done with a ICC profile and a lookup table, in which case varying or across the screen does not sound feasible?