We will have to find out how we deal, as a nation and / or as a civilization with the fact that streams and subscriptions exclude significant numbers of people due to cost.
California is now proposing that "Medical" (the state administered Medicare program) include up to 6 months of rent payments as part of "long term care" so the idea of free-for-everyone connectivity is certainly not inconceivable. But, until that happens, a large portion of the population is excluded from a total shift to streaming.
Again, those of use with such services tend to forget that many people can not afford any of such services.
And we have to see if there is a shift where the government subsidizes online "channels" just as they pay for physical roads and waterways.
But users have to have a high speed delivery service... or the government has to provide this as a service to all.
Just as stables continued to exist for decades as the conversion to cars occurred. And that is a valid comparison as the conversion to motor vehicles depended in a great part to government construction of paid roads and streets as well as the creation of laws and systems to regulate cars and roads.
I personally don't think the government will involve itself with the cost, or lack of cost, of online content, or even affordable internet access, for that matter. I don't see any movement in government presently to even counter the lack of broadband access for many people today. Any such movement seems to come from private industry, rather than Federal or State government.
Re: people forgetting that many can't afford such services: Actually, the general thought seems to be that everyone already has access, and if they don't, there must be something wrong with them. If there are segments of the population that have no access to internet services, it's a non-issue to them.
RE: high speed internet: for basic content, DSL is adequate for most of it. Cell service can provide adequate internet access for a lot of people, too. In fact, that might be how a lot of people already get their internet -- on their phone.
And I don't see any government figures, of either major party, overly concerned about anyone being left behind during the shift from OTA broadcasting to internet only, subscription based broadcast content. I don't think that is even on their radar screen.
I probably am more cynical than you are about governmental concerns about anything like this. In my state, for example, they already think everyone working at MickyD's will be able to pay out another $700+ a month for a new, electric car in a few years. They've already banked the Law on it. If you attempt to engage with pro-EV folks about the implausible economics of EVs for poor and working class people, it falls on deaf ears.
I think it's probably the same with the prospect of an internet-only broadcast content society, which, obviously, would cost more than using your FM radio. The argument would be that everybody they see already has a phone, right? So what's the big deal with everything going internet only? Most phones have internet access already, right? Even dirt poor, Syrian refugees in the EU in 2015 were using phones for internet access. So what's the beef?
Maybe they've got a point.