A happy narrative, but an unlikely one. Our brains are not designed to be end-user modifiable. It's naive in the extreme to think we could keep pace (in terms of intellectual enhancement) with minds that are.
They are evolved to be evolvable to some extent. The difference between a mouse and a human at the DNA level is not that great. That suggests significant mutability if we can find the right levers.
We don't even need to evolve them - finding a way to quickly cram in lots of knowledge is more than enough. Also, if we could take one geniuses knowledge and transplant it to another human's brain (no crazier than transferring conscience to a computer), that would lead to amazing advances (not to mention that it would solve the problem of people not understanding each other).
I can modify my brain fairly easily. The trick is to modify it for the better, which I haven't mastered so much. :)