In the town where I live, in a very nice part of Silicon Valley, Comcast is the only option. Their pricing isn't horrendous if you hound them for discounts (I pay $30/mo for 20Mb service), but I'm sure their pricing would be better if they had more competition.
At the very least, threats from telecom companies will force Comcast to compete
At a comparable cost? I don't think this is going to happen for a whole lot of reasons, including that a whole ton of infrastructure has to be built to support that use case (such as fiber running to all those cell base stations).
I think that it will be possible, but it's going to be very, very expensive for at least a few years, and then the price will fall to approximately what you pay for cable now.
I don't see the customer experience being any better (in the US, anyway) because the companies supplying 5G will be the telecoms, and their history of being "customer friendly" is already very well-known.
Verizon/ATT/etc are certainly not my favorite companies, but if they could potentially expand their customer based by offering home internet over 5G, they would operate very differently to try and gain marketshare (plus Comcast would need to respond).
But I bet TV will still be a major thing, say, 30 years in the future. Right now 75% of households in the US pay for TV, so I think your comment is a little overblown.
Over Christmas/New Years I was at my parents place, and they have DirectTV. The first few days were nice. After that I realized I was just watching for the sake of watching just to see what came on next, and it was all reruns of stuff I've already seen.
I am a big fan of curation, but I much prefer the curation of seeing what the programmers put on in prime time and then watching it on demand, or Netflix's recommendations.
If for some reason they couldn't do that, why would 5G change anything?
Perhaps you should meet more people?
(† There aren't 67 million Britons. But TV viewership in the UK is 28.1 million households, and the average household in the UK is 2.4 people, so we end up with an impossible number.)
So that's 12 households you're counting as "TV viewership" that don't watch live TV. They could watch any hypothetical TV show or advertisement, but they in fact will not. They would not disagree with your parent poster.
My mother (retired) is the only person I know who watches live TV. My Facebook is full of people chatting about TV shows (Sabrina, Doctor Who, etc.) but none of them watch it live. Some of them have paid subscriptions to various sources of TV, and many of the same people also have "pirate" hookups to get TV that isn't available in a timely fashion, as described many times they aren't unwilling to pay they're unwilling to be inconvenienced.