Some would likely imagine these machines may actually pick up the mantle of a deity, with humans serving them. I find that unlikely, and rather subscribe to the theory that humans as we know them will simply fade away as relics of their lineage. Declining birth rates in first would counties is a sign of that; it will only continue as mankind continues to spend more time building smarter machines, and less time building babies. This is, of course, not a bad thing. The machines are not a replacement for mankind, but rather a continuation. They will be mankind, just as our primitive ancestors were. The machines will be humans in a different, perhaps more godlike, form.