LOL at Tom, but also I agree that you don't have to go deep into the weeds. I wrote a short on the Singularity/Transcendence nearly a decade ago. Not a word about how it's done. It's about the impact on humans "now" that it exists. For nanotechnology, I think of Arthur C Clarke's Third Law - Any sufficiently advanced technology is indistinguishable from magic. No need to go into the weeds on that, either.
In the next few decades, this *s* is going to get real. People will be going to South America or Switzerland to get implants that make them better than other people at solving a variety of problems or dealing with massive amounts of data without an external computer. How does someone who is smart, but far too poor for the enhancements, compete? The movie Elysium touched on this. Consider if the rich have nanites in their cells that can not only erase the pollution they breathe in, but use the carbon dioxide to further populate the body with more nanites? Do the rich then care as much about air quality as the poor do? Still don't need to explain nanites--leave that for the scientists :D Read science for ideas, though.
ETA - and I'm sorry because we/I have gone far afield of the topic, but I also blame it in part on Angela :D <3
