Is he so correct on all economic and political issues? Or just on the ones that matter to his bottomline, like net neutrality?
Cuban WAS a Leftist. It sounds like he is moving toward the Libertarian area.
Far more likely the cable companies who make their big money from reselling bundled television programs would prevent you from getting movies and TV shows outside of their control. They will just happen to slow down and lose packets from Netflix (unless the ransom is paid) so you decide to use the cable company's pay per view.
Right now I don't like the government's efforts because I believe it will be vastly more complicated and controlling than merely saying "broadband companies cannot give priority so some companies' (even their own) packets over other others". I also don't like the broadband companies deciding which websites I should get my full paid connection to and which ones should be intentionally degraded. I paid for a certain bandwidth and I expect to get it without my data suppliers having to pay on top of what I paid. If the problem is that some people are downloading terabytes of data per month, then bring back total data tiers and payments (along with very easy tracking for the customer to prevent overages).
Channeling his inner Galt.