@sholling
I don't see 4k being a failure at all. It's pretty much replaced 1080p or is in the process of doing so. Pretty much all decent tvs are now 4k, Netflix and Amazon both film their originals in 4k, and many films are now being shot 4k.
I think 8k is just stupid. There is no way in hell one could even benefit from it unless you're sitting in the front row of an IMAX theater. With glasses, I have 20/12 vision, at a distance of 9' on a 55" screen, without hdr, I can see a very small benefit going back and forth between 1080p and 4k. Sitting 6' away, which is the minimum recommended viewing angle for my screen size, I'm still unable to resolve the individual pixels. To do so requires me being 6" from the screen.
If 4k manages to exceed my ability to resolve more detail with better than perfect vision super close to the screen, I see no reason why we would ever need 8k.
As for broadcasts, I'm willing to bet cable goes the way of the dodo soon. At least in my generation, we don't use it. Streaming has largely replaced the need for it, and it has greater benefits too, such as a lack of commercials, better video and audio quality, and the ability to chose what to watch and when to watch it.
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