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.