8k video is definitely worth it, for anyone with:
1. a movie theatre
2. a $100k screen
3. enough customers to allow making a profit who want to see their work.
Fail on any of those 3 criteria and it's a waste of money.
A fourth criteria would be a rich contract wrath at least $100k that specifies 8k video. Most people don't have one of those either.
It's amazing how many who meet none of those criteria are so interested in 8k video. Getting ready for some imagined future where everything is 8k video I guess.
It took 12 years after I was offered my first 4k video set up before 4k became affordable for the common man. Most of the people I talk to are still happy with HD. For folks my age, it's likely 8k will never really be thing.
Leave it for the young pups.
It might be noted, people still make 300 plus horse power cars. Power on it's own means next to nothing.It still has to be appropriate What do you suppose 8k is appropriate to?