At the Ansel Adams exhibition I went to a few years ago, people were going face first against an 8x10 foot three-panel screen he printed, then backing away, then going up again.
That's a completely different situation with the large format film he shot. You aren't going to put your eye up to a print if there isn't anything you're going to see that close that isn't visible from 5 feet away.
People will get close if there is something extra to see up close. I've seen 20x24" or so prints of his that look absolutely incredible up close.

