Technology in 2019 has many ways of augmenting the human body, for example: hearing aids, pacemakers, artificial hips, breast implants, artificial spine discs, coronary stents and even artificial eye lenses. In addition to that there are many different kinds of prosthetics, even thought controlled.
Presumably the next big step will be all artificial organs, combined with advanced prosthetics, and humanity will enter a cybernetic era.
Assuming that at the peak of cybernetics era, the nanotechnology is perfected to the point where humans don't need surgeries that replace human organs and body parts. Instead, the nano robots that are always present in the blood stream instantly repair any damage to all organs and body parts and augment the human body, greatly increasing all capabilities.
What would be the next step after nanotechnology, and why?
(for example: could nano robots be replaced with some kind of DNA programs that are immune to EMP weapons in the wars of the future?)