does a game have to add support for it? I thought HDR was just a system level thing?
Games need to have HDR enabled (it's a bigger color spectrum), same with movies. Older games don't innately produce a larger color spectrum (they've never had a reason to, until now)
First game to be release with HDR is Forza Horizon 3. Think I read it's not *extreme* Biggest details you'll see out of it is the skybox/clouds.