Right

i just downloaded this game and tried to enable HDR. did not worked. so below is the workaround that i performed in order to get HDR. (please note your system must have proper H/W in order to get it right)
[1] make sure windows 10 HDR is enabled as this game is OS HDR depended.
[2] enable HDR in the game options.
[3] ALT+TAB out of the game.
[4] ALT +TAB back in to the game and observe the resume option. if the red background color is more vibrant(more reddish and not washed out looking) then the workaround worked for you.

i'm playing at 2K resolution in a 4k monitor(in 4K the FPS goes below 30) with all the VGA options set to max. it seems the DLSS is the better AA option here in terms of AA as well as performance.
ray tracing and HDR is the way to go and Lara... damn, this the best Lara i have seen .