Society will control that as much or more than laws. If it's not socially acceptable to be out without a mask then people will wear masks as an example. How do we get to that point is the big question.
I think normalizing that has been part of the rollout strategy. I'm of the mind that most places didn't just instantly go to full shutdown with masks required in public because that would have been too much at once. It's the whole thing about if you put a frog in boiling water it'll jump out, but if you put him in and slowly warm it up, you'll have cooked frog.