re: Artificial Intelligence and what it means for Humans. Enlightenment or Slavery?

It's not likely that that Agent Smith could ever be anything more than a character in a Sci-Fi movie. The Matrix is a bad movie series showing the exploitation of humans as sources of energy for their machine rulers.

Efficient energy from a human source? No. There are too many far cheaper energy sources to consider. The energy needed to sustain a human source would be many times greater than would be its output.