The Secretive Immortality of Artificial Intelligence

In the future, there's a digital life form that is more dominant in some sense than humans are today on Earth. And there'd be something very different about them because they didn't have to worry about death. Basically, people haven't really noticed this yet, but we've discovered the secretive immortality. So these digital intelligences are immortal, as opposed to the kind of biological intelligence we have where whatever our learning algorithm is it appears to make use of all the little quirks and peculiarities of brain wiring.