1% is 1% by buying their competition and buying politicians to pass legislation that will prevent new competition from threatening them, or being born into it. The ones that become rich either win the lottery or think of something that nobody has ever thought of before, which is more rare than getting struck by lightening, which is why media makes such a big deal about these stories. Most of it is software, because that's the only market that anyone can enter. Look at game development: you used to be able to make a quality game in your basement, now unless you have a budget of millions and a huge team of experienced individuals and a great idea or an existing popular franchise -- forget about it. Mobile was the one market that a fairly talented individual could get rich with, but that's even becoming something for the big developers.
An interesting though: as technology improves, there's less of a need for human employees. The positions that still need people get minimized as processes improve and companies become more efficient. The more people without jobs, the lower wages can be reduced and still get filled. It seems to me like it's inevitable, and I wonder what happens when the super efficient companies now no longer have a population that can afford their shit? Socialism?