Just a note: when you look at depictions of the world pre 1960s, they tend to portray or predict a future human society which is positive, or ‘utopia’ as some would say. Whereas media and popular imagination after the 70s tends to portray the future as a cyberpunk dystopia or world devastated by nuclear war or catastrophe (Planet of the Apes, Mad Max, Terminator, Bladerunner, Robocop, etc.), and some even as post-post-apocalyptic such as Hunger Games/Maze Runner where the collapse of humanity has come and gone. Why did people become so hopeless in the 1960s/70s for a brighter future? Why has all entertainment and pop culture portrayed the far future as cyberpunk/hypercapitalist dystopia or obliterated planet? Why as Zizek says is it easier to imagine a world destroyed by an asteroid than the end of capitalism? Has society taken that Capitalist Realism pill so hard it can never be undone?
The move away from utopianism in movies and novels is a direct reflection of the slow-down in growth. My measure of growth here is not the growth of a single dubious number representing economic evaluation, but the trend of multiple simple measures. We don't need to debate how to aggregate these numbers, since their growth patterns are similar, so playing around with their respective weights in an aggregate won't change much about the big picture of the trend. Think of the speed of planes, the amount of electricity produced, and especially the lifespan average.