This is what I call a recoat. In some circumstances, it is an okay option. I always give folks the option to recoat vs. sanding. i also tell them about the risks involved, peeling due to adhesion issues. We rarely know what might be on our floors that could cause adhesion issues.
I agree, it isn't the best method for all floors. We just call it sandless refinishing because it sounds better. If you prep the floors the proper way adhesion should almost never be an issue.