The cultural relevance of all kinds of American media has been declining as the U.S. is not cool or aspirational anymore.
I'm just curious because, for better or worse, American movies, music, and TV still seem globally dominant from my POV and it'd be interesting to know if and how that is changing. There's kind of a huge moat, other countries haven't built out these global powerhouse media industries.
Another layer of the moat is how much that media and tech hegemony has entrenched English as the global language. Any culture based on a different language is going to have a really hard time getting beyond their borders.
When someone says that the relevance of American media is in decline, that implies that something else is becoming more relevant. There has to be something there beyond "America sucks now."