josejones :
So not all the motherboards include support for DisplayPort 1.4 and HDMI 2.0. Many are still the older DisplayPort 1.2 and HDMI 1.4, which kinda sucks at this point.
Yes, Intel's new iGPU supports HDMI 2.0, but there is additional hardware on the motherboard that determines the display support, and to cut costs most are opting to use HDMI 1.4 hardware.
What is really unfortunate is that most boards that do support HDMI 2.0 are high-end boards. That makes sense in one way, because they should be the most feature rich, but it is all the less likely someone will use an HDMI 2.0 port on a high-end motherboard. Most people that buy those boards will opt to use a more power graphics card. I'd really hope some of them will start to produce more low-end boards with HDMI 2.0 ports, as those may actually find use.