Not an issue for me though. The panel is 8-bit with FRC. I will probably get a better result with RGB 8-bit + GPU dithering than with 4:2:0 12-bit.
If your panel is 120Hz won't feeding your TV 10bit or more and letting FRC do the work be a better job (as the FRC can work at 120fps and thus can dither between the two 60Hz frames, or 5 x 24Hz frames - whereas with a GPU you'll be displaying the same dither twice at 60fps or 5 times at 24fps? )
I thought the whole point of HDR 24p working pretty well with 8bit+FRC was because you got a lot of frames to do the FRC dithering on for every source frame? If you dither in the GPU then you don't get the same effect ?