I have a theory that human imagination/creativity is linked to our dreams, and that we learn and change faster because our different brain halves play off scenarious to each other to test them out. our internal dreamworld can suspend and jump over the limitations of the physical world (like time, place, senses), but still manage to improve how we understand and interact with the world when awake. I think a better understanding of the human brain and especially dreams is needed for the next big leap in machine learning, instead of the brute force techniques used now to train static models.