I've taken to calling this kind of media "Mandatory Adult Television." I think the first of its species was Lost; there were predecessors with some similar traits like The X Files or The Sopranos, heavily serialized adult content television that was very popular water cooler talk, but Lost was the first one I remember as segmenting the population into those who follow he show, and those who don't. Game of Thrones was THE big one. You either watched Game of Thrones or you weren't allowed to socialize as an adult. "Hey, did you see Game of Thrones last night?" "No, I don't watch that show." "Oh. Bye." For nearly a decade. No one wants to talk about that show anymore. Same with Lost.