If something becomes important or necessary, the entire document would be leaked, or relevant sections documented. Thank you Scihub and libgenesis.<p>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+.<p>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.
I feel like HDMI is dead anyway since USB-C. Not only do I get display port over it, it powers my laptop and lets me use the same mouse + headset for whatever laptop I happen to be using.
According to another comment here, display port is OSS! Ive always liked it more anyways since it has like 2x the bandwidth IIRC, like 80Gbps. So almost any displayport 2.0 cable/connector pair can do fast refresh rates at high res. In contrast HDMI is confusing with weird versioning numbers.