I have been using the auto HDR for video the last few days after noticing it in the Nvidia control panel and been quite impressed with it. Watching 1080p netflix on the standard package that doesn't offer HDR, then using the Nvidia HDR to add it in.

HDR for games is generally not implemented well on pc even in new releases, going to give this a go as it looks impressive and a step up from the windows auto HDR for games.