For now. The rest of the world is rapidly catching up in pretty much every sphere.
But take movies:
America has but a paltry 330 M people. The appetite for "American" media will wane as India, China, and other vastly more populous Asian countries begin to produce Hollywood-caliber films. American box office increasingly relies on non-domestic consumption. Chinese films are doing bigger revenues, and soon Indian films will too.
Korea is starting to sweep the Oscars, Emmy's, and Golden Globes.
Hollywood is going to be washed out by the vast talent, capital, and differing tastes beyond American borders.
The age of the "American" film has already peaked. (It's not just the market growing up. Kids today no longer want to be Hollywood stars - they want to be famous on YouTube, TikTok, and Twitch.)
The same trend is observable in other fields. Science, technology, fashion, etc.
edit for downvotes: Do not confuse this post for anti-American sentiment. It's an honest current and forward-looking assessment.