The problem is that most HD signals are encrypted. The cable/satellite companies such as Comcast aren't going to license their encryption because they want to sell their own cable boxes. Cable card which was supposed to solve this problem is all but dead.
Anyone can guess. It takes no effort to throw out lots of predictions and have some of them be correct. You are not and wiser or better for having your guesses be right. Even a blind man can hit the bullseye.