It's been a while since I read Rand - but I thought she felt that those monopolistic forces would use the government to empower that monopolistic behavior. What we're seeing is that if the government does nothing then that monopolization absolutely continues.

I don't see a way the free market alone could deliver us from this. Well crafted and enforced antitrust legislation seems to be the only thing that has ever worked against this kind of force. The key in that is making sure we don't elect an oligarchy who wields that antitrust to defend their interests.