Industrial nanotechnology will emerge gradually and continuously from the technology of the present. Automated systems always exist in a larger context which is not automated, and their products are not free. Regardless of what can or can't be done with atoms, or with computers, machines will still have to be designed. They won't design themselves. Designing, building, and retooling complex apparatus won't be easy or free in the future any more than it is now.
Artificial intelligence is irrelevant.
Whatever capability AI has at any given time, humans assisted by computers will have already reached that point and moved ahead. Making things with atomic positioners will be at least as expensive as making them with biotechnology or bulk technology. Atomic positioners will only be used to make things that could not be made in any other way. There isn't going to be a nano-utopia. With nanotechnology we can build apparatus that will enable us to understand the phenomenon of quantum entanglement, and make use of it.