Not sure if I buy it, how would that even work? lower licensing fees when no display port? I suspect the real answer is that HDMI managed to capture the market for digital video links and while display port is better it is not enough better for people to want to make the incompatibility jump.

But.... Conversely it does almost make sense. because finding DP on a TV is super rare, nobody is even trying. Historically you would find all sorts of rareish connectors on TV's(component video, s-video) so.. conspiracy... perhaps.