I absolutely agree. 8K content is so far ahead of current production standards that it will take at least half a decade for the showbiz to catch up. BUT I feel that they will get there… eventually. Even if for marketing reasons only: it’s easy to sell something as “new” by just tossing around higher resolution numbers. Some studios and/or streaming services will definitely go there at some point and yes, the Internet and straight-to-home delivery will drive adoption at first.
There IS a difference between true 8K content and upscaled 2K/4K content, I can attest to that being used to seeing 4K and 8K TVs showing the same test material for more than three years now. It’s just that people will have to spend more money, in order to get 85-inchers, and sit closer than many viewers are used to sitting. The first is a question of affordability, which gets better every year, the second… well, a question of habit.
In my humble opinion, there is a place for 8K TVs and 8K content, it’s just that (a) it’s a tough sell right now and (b) the law of diminishing returns in tech obviously makes these products less appealing than manufacturers hoped for. But we’re already seeing most of them reserving their best display tech for 8K models anyway, so demanding consumers will adopt 8K as a result of that during the next 2–3 years. So when there’s a somewhat addressable user base for 8K content, it will start appearing more often, just like 4K in the early days. It all just takes… time.