it won the best format.
HD DVD is not much cheaper. it uses a laser diode like the blu ray.
and both proyects were started by sony engineers.
but early blu ray disc require some protection that was more expensive.
it didn't hurt sony but studios that wanted to sell data on it.
but then that got cheaper, and blu ray was 25gb-50gb for space. way better.
http://en.wikipedia.org/wiki/HD_DVD#Origins_and_competition_from_Blu-ray_Disc











