is the biggest hit movie of all time. Why does the lack of manned space exploration not impact movies like it does TV or (I guess) novels? Not to mention video games, where sci fi and space-based scenarios are very common and popular.
The thing that explains this best is gender preference, which maps to both genre and media. Women and girls like fantasy/supernatural and also TV. Men and boys like sci fi and also movies and video games. I don't really follow the book business but I wouldn't be surprised to find that women read more, while the guys are busy with video games. People only have so many entertainment hours during the day.