People still joke about the carpets on starships (including in-universe in the recent shows), but honestly, you can pretty much measure how we've lost the optimistic future by tracking how Star Trek shows (including the post-2005 ones) got darker (literally, I'm talking about how the scenes were lit), the architecture less Hilton-like, and eventually, when carpets started to disappear.
Apropos visual media, there's another example of an optimistic vision of the future, which the article also indirectly mentions: Disney's Tomorrowland - not the fair, the 2015 movie. Severely underrated, that one. I broke down in tears when I watched it (okay, I was in a vulnerable period), because it was an unexpected breath of pure optimism about progress. I mean, the movie is literally about the very thing the article talks about - it recalls the optimism of yore, presents a protagonist who's asking herself and us, where did it all go wrong, and then tackles the question directly. The answer it gives may or may not be any good[0], but at least an attempt was made to talk about it. Sadly, this is the last attempt made so far in popular media, at least as far as I know.
I'm puzzled as to why these two stories were not mentioned. They're not exactly outliers no one has heard of.
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[0] - We're effectively fucking our own future up by only ever talking about disasters - past ones, current ones, and every plausible prediction of future ones - in a feedback loop with news and entertainment; we're simmering in despair, securing a doomed future by not being able to envision anything good as a society.
https://blog.plan99.net/i-want-to-see-a-libertarian-star-tre...