Humans and machines will have no determined lifespan

Ray Kurzweil : futurist
AI's will frequently make "backup copies" of themselves, guaranteeing a sort of immortality should the original AI be killed. The concept of "life expectancy" will become irrelevant to humans and machines thanks to medical immortality and advanced computers.

Kurzweil, Ray. 1999. The age of spiritual machines: when computers exceed human intelligence. New York: Viking.