Color (Aces, LUTs, Gamma etc)

Important Links

ACES, OpenColorio, Octane, theory https://skientia.co/cgi

https://chrisbrejon.com/articles/ocio-display-transforms-and-misconceptions/

The Hitchhiker's Guide to Digital Color (Sobotka) https://hg2dc.com/

TBR (to be read)

https://www.reddit.com/r/colorists/comments/1202vvi/100_dcip3_laptop_screen_got_questions/

Margatron

sRGB has the same white point as rec709 (D65), but it is gamma 2.2, whereas rec709 is gamma 2.4. P3 DCI has a warmer white point (D63) and is gamma 2.6. This is because in a theatre, it's a darker viewing environment and reflected light rather than screen light. So your eyes adjust according to the environment, and then it "looks" the same as a screen.

If you're used to sRGB and need to output that colour space, then I would keep your screen set that way. Unless you're making DCPs for a theatre, I don't really see the need for a DCI screen. All your outputs will look dark and cooler as soon as you see it on an sRGB screen.

DigitalFilmMonkey

A 2.6 EOTF (the correct term for screen gamma) is darker than a 2.4 EOTF... 2.2 is brighter. The green white point is irrelevant, as compensation is made to make sure whites remain visually D65. Actually, DCI P3 D65 is now commonly used.

Also, Rec709 is not 100nits. A grade-1 display is specified at 100 nits for grading, but Rec709 has no such specification.