The OSHA requirement will hang around, but people won't be freaking out about it because it will be normal. Within two years there will be a childhood COVID vaccine that is safe and effective and it will be required for school attendance like all the other shots.
All the people freaking out about the vaccine/mask requirements will have matured out of it or will find something else to be outraged about.
If I'm wrong, I will come back and say I was wrong. :-) I may lose an internet point or two.