Taking repeated screenshots of a GUI and making sure they don't change across commits is a useful thing to have in CI a lot of the time to make sure if you did change something somebody's eyeballed it for correctness.

However I'm not at all claiming that removes the 'eyeballed it' step, just that it makes it harder to miss said step :)

I'm expecting someone to train a ML model soon to interpret and score GUIs.

"This page is confusing" and "This page no clear call to action" And "This page is ugly" And "This button doesn't look like a button."