If you have an evening to burn, 17776 by Jon Bois[0] is a surprisingly captivating multimedia story/project about this topic. It speculates about a future Earth where people have been immortal for thousands of years and explores what happens through the lens of absurd football games. Previously discussed on HN in 2017[1].

[0] https://www.sbnation.com/a/17776-football

[1] https://news.ycombinator.com/item?id=14714607