Whenever a method to do work more efficiently comes to be and propagates at scale an explosion in diversity of work emerges. This happens at every level of abstraction in nature and has recurred throughout history all the way back to the dawn of life.

Just because I can't predict exactly what work people will do doesn't mean they won't do work. I can take a stab at a few guesses, surely others have more prescience, but the thing about complexity and fractals is it's easier to predict meta qualities than it is specific manifestations.