IMO, Blade Runner is one of those movies you have to 100% vested in. You can't chew gum, can't surf on your computer, can't check phone messages. Your eyes have to be on screen at all times or it will lose you. Same thing if you are watching Apocalypse Now, Chinatown or even The Godfather for the fist time. I don't know what it is about those movies but they seem to loose a lot of people if they are not being very attentive, unlike some other movies where you can be doing 5 other things at once and not miss much.