I want to change some life configurations and see what is going to happen after 1000 years. Let's say, humans found a way to live without eating and drinking,

I want to change some life configurations and see what is going to happen after 1000 years. Let's say, humans found a way to live without eating and drinking, now how life is going to look like after a some time? It is basically a more sophisticated and realist version of the game of life.