A big rant about nothing. A 4K

TV doesn't force anything on anyone. If you are worried about your cap but end up with a 4K

TV, you can keep downloading exactly what you download now- no net negative effect on you at all. It doesn't force you to only download 4K video and thus doesn't obligate it's owners to burn more bandwidth at all. Just keep doing what you're doing and
the net effect is NO difference vs. your data cap.
However, even for you, it will be able to run apps more efficiently, bring on improved games, function more efficiently, etc.
If you are shooting your own video- say on an iDevice- you can shoot it at 4K and display it that way easily with this. And that won't burn 1 byte off of your data cap.
In your off-the-grid status, if you perhaps "roll your own" by buying any discs and converting them, this will open up ways to play 4K without having to burn 1 byte off your data cap too.
Since it can work wth HEVC, file sizes can be SMALLER while maintaining quality. If iTunes can "see" the "5" is requesting a file, perhaps even the 1080p or 720p stream you usually seek might be fed as an HEVC file. If so, that will actually REDUCE the amount of data you burn to keep doing what you are doing.
And so on. Apple can't fix your broadband cap issues. Nor should they constrain their development because of the potentially limiting choices of other companies. Apple should develop the best hardware it can in hopes of pressuring other companies to "keep up" with their parts of the equation. If instead, those broadband companies opt to try to constrain with pricing/cap penalties, flex your consumer option of competition. No competition where you are? Move? Or take your computer to work or where you can access fast internet, buy your video in iTunes and download it there, then take it back home and stream it to your

TV.
I understand the frustration of broadband caps. But in no way should that make a tech company cling to a status quo that just happens to "fit" now. Else, if your broadband source decides to further pinch that quota, does that press us back to 720p or SD to "fit" the capacity. You have many options to feed your current or new

TV besides the lone option of exceeding a broadband cap by only downloading 4K as if this forces that. It does not.