I tracked down a bit more info on Delta Early Valet, a really cool service where they will load your carry-on bags in the overhead bin above your seat before you board.
Early Valet
Delta Will Put Your Carry-On In An Overhead Bin Above Your Seat? And, They Don’t Charge You For It?
I’m fascinated by this. I’ve reached out to Delta to see if they have larger plans for this service that would save elites a ton of time crammed onto planes when they don’t need to be.