Really, 8K is wasted on anything less than 77” and if you’re not viewing less than 10 feet from it. 4K is the gold standard and will remain that way for years to come.
This is a very good point. We also have to take into account the fact that a lot of content won't ever be redone in 8K. A lot of the classic movies and even recent ones are ever going to see 4K at the most.