http://arstechnica.com/gaming/2016/11/here-are-the-games-with-expanded-color-support-for-your-new-hdr-tv/
The good news is that HDR support on Final Fantasy 15 - which is phenomenal in this title, and proves that HDR (brightness , color contrast , black levels , wide color gamut) is the next leap in Visuals. Entertainment , 2160p is relatively an old thing now. Shadow Warrior 2 on the PC looks very nice too. HDR is a Real thing not a gimmick I am testing on through dufferent HDR sources on 4k HDR TV. 2017 will have PC Monitors Support HDR , NetFlix , Google Prime , Youtube , 4K UHD HDR movies , Forza Horizon 3 , GoW 4 already involved and the support list will expand. Polaris /Pascal speculated about the potential of HDR and they actually nail it with the HDR 10 bit signal output support.
HDR when you actually see it , it is totally different from watching it on Youtube as reviews or reading about it. Very immersive real life picture. Watching The Amazing Spiderman 2 in HDR is a new experience.
Still HDMI 2.0 bandwidth is limited of outputting 4k 60 hz HDR 10 bit color 4 4 4 Choma or RGB with 10 bit color HDR. Simply DP will solve that.