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

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.

This is a very neat thing, thanks for sharing!