Personally, I find the idea of artificial intelligence both silly in some respects, and anti-human in others. There is no benefit to humans in replacing them. Any benefits are more about specific humans and taking over the world, as in human's advantage relative to other humans. It is the same as nuclear weapons. It doesn't help humanity in any way, it just gives certain humans power over other humans. Also, most of the time, artificial intelligence is no match for human intelligence. One of his goals was to get the AI to "learn his tastes", but to me, this just means he will be given poorly selected music, as what you want to listen to is much more complex then "learning your tastes".