The HDMI Forum, responsible for the HDMI specification, continues to stonewall open source. Valve’s Steam Machine theoretically supports HDMI 2.1, but the mini-PC is software-limited to HDMI 2.0. As a result, more than 60 frames per second at 4K resolution are only possible with limitations.
That’s not really how it works given that so many devices have HDMI ports.
If we expect to make hardware devices that are generally compatible with interfaces non-technical users use, then excluding an entire class of common modern interface spec isn’t a great choice.
It’ll be fine for now but as the specs bump up inversion and HDMI changes over time is just going to get worse