I can see the difference in my 8-bit desktop background gradient, which is blue, and I don't think that's surprising at all since it's a brightness/value difference which is probably perceived through more cells (or more sensitively) in the eye. I can't link a study either but I'd like to have 10-bit even if it's just for the light axis.
Coincidentally in a YUV encoding I'd only push the V axis to 10 bit - maybe even 12 to cover extra HDR range, i.e. higher absolute brightness when the display supports it. (Or go with a logarithmic encoding, in which case even 8 bit might be enough...)
Coincidentally in a YUV encoding I'd only push the V axis to 10 bit - maybe even 12 to cover extra HDR range, i.e. higher absolute brightness when the display supports it. (Or go with a logarithmic encoding, in which case even 8 bit might be enough...)