If companies don't decide for you, we would still be using VHS tapes.
Good argument. That explains why LaserDisc is the leading current video format - VHS sucked.
</sarcasm>
Point is - the marketplace decides. Companies that try to push something else on consumers will suffer. (Sony stumbled after BetaMax was rejected in the consumer space (in spite of many advantages) - then redeemed itself by coming out with the best damn VHS decks on the planet).
People still shoot with beta today, beta moved to the professional side while VHS moved to the consumer. As far ad HD DVD is concerned blu Ray won becau the hundred of millions given in bribes to Fox and Warner Brothers.
Blu-ray won for being a better, more modern technology. HD-DVD was crippled by trying to stay more compatible with old school DVD. (If you're going through the pain of changing formats, make a bigger leap with longer payback - not a small jump.)
And - the big "Blu-ray is too expensive" argument from the HD-DVD camp has been proven to be nonsense - just look at the big section of $9.99 Blu-rays at Fry's every week.