That's not a given, seeing how the software people have access to is often specifically made to prevent people from wanting, or even realizing, that it could be changed. I'm thinking of iPhones, but also about what motivated me to start programming: games. Nowadays, consoles are the epitome of DRM, and many PC games are following on that path.

Unless open source catches on soon, I am afraid only smaller and smaller proportion of humanity will be programmers, even without the compounding effect of the general population constantly increasing and diluting the existing programmer pool.