ok FIRST off, pointed at one of the answers here hd tv has nothing to do with hd or blu ray. HD stands for high definition, hd and blu ray are both high definition, so dont confuse tv cable with that.
Blu ray will win, It is much clearer then hd. And there are so many large companies backing blu ray such as sony (one of the largest electronics companies in the world), panasonic, lg, samsung, sharp, etc. Plus blu ray has the backing of disney which is one of the largest companies in the world, and there are rumors of the adult industry moving to blu ray and that is the largest industry in the world.