Im guessing humanity will require biospheres in our future.  At some point humans will realize how precarious a situation we are in.  This concerns earths ability to generate a stable atmosphere humans can survive in.  It doesnt have to be so and sometime in the future it will not.  For humans to survive we will need to create a home capable of surviving vacuum, flares, lava, tremors, gales, and all the other world ending likes.