I will not sit in a totally dark cabin during a daylight flight across the U.S, and I don't care about the movie. I will lower it somewhat as a compromise if it is glaring on the screen but I will not completely close it. I never understand why anyone would want to watch some horrific movie rather than viewing the beautiful scenery. Likewise, when crossing the Atlantic westbound I want sunlight and not the feeling that I have been in a tunnel for 10 hours. Those who are bothered can wear eye shades.