Let's get back to business basics for a minute. Does an 8x10 cost more then a 5x7? Does an 11x14 cost more then a wallet? Sure they do. Why? Because bigger is better!!
Look at all the websites marketing themselves as having HD movies. Why do they do that? They do it because HD is in demand right now. HD is in demand because the picture is bigger and if processed correctly, clearer and sharper. It takes the same amount of knowledge, skills, lighting and talent to shoot good HD as it does to shoot good SD. But because the HD is a better product that is in demand right now, I don't see a problem with a producer charging more for HD video.
