NZT is an answer, guys! 😂

I agree that at this point self-discipline is the one of the decisive factors, but even now it's not the only one already, as there is huge difference in what different people are able to do and what time it takes them. Some people are smarter or faster for some reasons or in some areas, others are not, and it's even without implants.

Of course, with great effort, self-discipline and persistence a person is likely to reach his or her goal, but it's more like an exception, or at least it would take much more time and effort that for those who are so to say "superior" in some traits and skills.
I believe with the invention of some sort of implant things will be pretty the same, only now the elite would be those who have the right qualities and sources to get those implants, nonregarding the initial traits and skills as such.