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Big Surprise—Nobody Wants 8K TVs
(www.howtogeek.com)
This is a most excellent place for technology news and articles.
If memory serves, last year's summer Olympics were televised (to some degree, anyways) at 8K, even if it was just a technological flex or test.
I can't imagine the bitrate was high enough to make much difference in quality.. But I don't know what the technical details were.
Here's something, though it seems to have a heavy "look at how great Intel is" spin to it: https://www.digitalcameraworld.com/news/the-olympics-is-being-streamed-in-8k-but-its-kind-of-a-secret