I hope that they come up with something. I can't stand it when if I happen to board late, when I arrive at my seat the overhead bins have been selfishly filled with people's suitcases when all I want to do is put my one (laptop) bag overhead. Really annoys me especially when the owner of the bag is sat several rows away.
The worst is when you sit, watching people block the aisles during boarding whilst they try to put a case in the locker which is NEVER going to fit. Not yesterday, not today and neither tomorrow.
Often in my experience, push-backs have been delayed due to these passengers and takeoff slots have been missed, consequently delaying the flight.