If I'm a TV manufacturer, I have less incentive to have both connector types because it increases cost and complexity while only appealing to a very small subset of users. It will take leadership at those companies to take a bit of a leap of faith that the effort is valuable as a long term plan because it will take other manufacturers to make the ecosystem. Couple that with the fact that leadership at companies tend to not be enthusiasts or technically inclined and it makes it difficult, but not impossible. I really hope we can move electronics towards DisplayPort just so it's an open standard instead of the HDMI for-profit model.