For reference I was part of the rollout of 4K digital projectors in theaters 10 years ago.

At the time some cinema owner with a training in management of projection where underwhelmed by 4K. for them, we reached a resolution plateau at 4K.

I wonder what they think of 8k tv :)

( context : for their screen of 12m wide , 4K was when you start to have diminishing returns in term of quality )