So the HDMI founders are Philips, Panasonic, Sony and Toshiba Known for their Players and in part TVs. The HDMI Forums consists of the rest of the TV Manufacturers and the big names in component Making (Analog Devices, NXP, Realtek, Qualcomm, etc.). So they are all members of a cooperation dedicated to “encouraging and promoting the adoption and widespread utilization of its Final Specifications”. I hesitate to call their decisions on connectivity options unencumbered by interests.

oh btw: Anti-Trust does not require to there be no competing offer, just vast majority of market share.

Display Port has a standing in Computer Displays but is basically unheard of in Home Entertainment.

Since we now have confirmation that an open implementation is legally impossible I would consider the HDMI forum to be a cartel and not a standarts comitee. Therefore it should be dismantled by anti-trust authorities asap.