Miraculously we will understand our unity, stop fighting, stop overpopulating, stop wasting resources. We will see our relatedness as Love and Friendship between us. Only then we will build a better world. A piece of cake but we need to hurry.
It will become more soup.
Ok, I'm stealing this from The Matrix. Humankind is a virus that will consume everything it comes into contact with. When it runs out of external things to consume, it will consume itself.
Apocalypse or Singularity, whichever comes first. I'm rooting for Singularity with a really great user experience.