We will not progress unless there is research, and sometimes something totally unexpected pops up during R&D, which benefits everone.
So far, we do not have 4K TV's, so most of us could not watch anything 4K. But, those who do say its much more lifelike and easier on the eyes. 8K could only be more so.
So, I'm all in favor of working to develop advanced technology, its the only way we can advance the state of the art. I predict it will not happen soon, it takes time.