Edit: I'm too young for this, but it's along the lines of Personnel from the '60s becoming Human Resources in the '70s and '80s, and Human Resources from the '90s and '00s now becoming People Operations in the '10s and '20s.
I suspect in the '30s it'll change again. Maybe one day there will be a culture change towards boring and we'll just call people "customers," "employees," and the departments responsible for hiring the "Hiring Department."
And people will get mad about that, too, because the HD will be responsible for the paperwork required to fire people, too.