In a very basic sense, we have seen the first iteration of nanobots. Scientists have learned how to make nano-particles do things on command. Very cool. They'll ramp this up in stages, with larger and larger results, until nanobots are a reality of modern life.
And then, of course, they'll kill us all. But until then, fun times!
And then, of course, they'll kill us all. But until then, fun times!