When you say "many of them believe the inevitability" of a takeover of AI; I don't believe you. There's a huge AI department at the university I work in and what they're doing is trying to get programs to learn. By learn I mean become aware of their environment, react to its parameters, remember those parameters and then work within those parameters. That's a long way from composing the Liebestod from Tristan und Isolde. In fact it's never going to happen.