Out of all the crazy Sci-fi scenarios out there, this is the one most likely to happen in our lifetime.

Here is the scenario:

The Year is 2040, machine learning, robot technology have advanced to advanced to such a degree that robots are capable of doing most if not all of our jobs for us. A few creative jobs and political positions are still manned by people, but the vast majority of professions are seeing a drastic decline in their human workforce. How would this effect human society. Since society has existed it has been built around the concept of human labor. What will happen when that is no longer the case?