Who is they? And last I checked, displayport is very much supported in PC hardware.
The AMD card before that and the Nvidia card in my other desktop have a similar number (one HDMI, two or more DisplayPorts)
I'm curious too.
The more likely outcome is the specification will become its last version. If the spec isn’t open, people will implement it, but poorly. This will lead to gross incompatibly, and force people to default to known good legacy standards. For reference, see USB 3.0+.
HDMI is already USBified. Most of the headline features of 2.1 are just making the 2.0 features mandatory, but introducing another set of optional features.
It's not. Documents are only available for VESA members.