This is exactly like the case of things that been overlooked at first, but eventually became something that people want, a sudden upcoming trend. It's true that HDR TV were expensive for now, but it will finally reached the level of reasonably price people can buy without a lot of effort to save and spend their budget on it.
That's of course if HDR TV is proven to be successful in the market, if it is not so successful, than it stays as a premium, expensive material for some customers that have serious will to buy for the sake of trend and technology.