I like the AI convos. People keep saying that a computer program can never feel emotions...and I would probably agree. But AI, the kind that I believe will work, is from the ground up, not top down. As in, we don't program a computer to act like a human, we try and make a human from computer parts.
It's a long way away, but if we can reconstruct all the electric and chemical actions going on in a human brain, we've creating a thinking machine.
But, humans will be the dominant servant for ages to come. I truly believe it's going to be a long time before humans can, from scratch, come up with an engine as efficient as a human being. Sure, we can make a robot do stuff, but we already have a very large interest in making human food (to put it mildly), so economically, it would be easier to make more food, than make fuel. Humans are versatile, self-repairing (to an extent), etc. I mean, our intelligence is young, and evolution has had millions of years fine-tuning us. So we have some catching up to do before we can up one up.
Either way, I'm not dreading the future robot invasion. If they're smarter, deeper, and stronger than us, and they evolve themselves faster than we can evolve ourselves, they deserve to take the world from us. They will be the superior species