This is exaggerative conjecture. I've read Bostrom. It's science fiction.
Science fantasy is something that can't happen because the laws of physics won't allow it. Hard science fiction is just something we've not made work yet.
The stuff around evolutionary algorithms is things that have a workable means of occurring. Emergence in evolutionary algorithms has been shown to occur again and again and again.
You better start believing in science fiction; you’re surrounded by it.