It's funny to think that no matter how our technology develops, cats will be right there along for the ride, completely ignorant of it all. It's humorously comforting to think of an interstellar civilization powered by fusion and AGI serving cats just as they're served now. Scratching posts on starships seems to be inevitable.
This seems like a book.
Humans extinct for a billion years, AGI and robots tasked to feed and "take care of the cats".
I imagine entire cities, houses built, all empty save cat and humanform robot.