I think what is going to happen is that human mind will "evolve" very rapidly once we develop technology to backup/restore human brain complexity.
Challenge now is to map neural complexity into a data model.  Once this can be stored in some sort of model, the next step would be to first,
make a single neural connection on demand.  Once you can do that, the stored model can be used to re-generate the neural connections you have
in your brain right now.  And add more connections as desired.

The regenerative brain technology will allow for rapid expansion of brain capacity.  Imagine having brains of 1000s of people, without changing the size of your physical brain.
It will completely change how these new specie of humans will view the world.  We'll be viewed as a single threaded DOS programs. Neanderthals if you like.

Now imagine these 'Homo Turing" humans working on new science and technologies.  They will be able to advance human knowledge to completely unimaginable level.
Average kids in kindergarten will be smarter than Newton and Einstein combined.

It might go the other way, we'll abandon carbon based forms and go straight to silicon.