It is called "room ready" and it has been in effect for some time. They use it a lot but NOT always. Seems to be up to the resort and the management. Some use it during busier times only.
I love room ready but wait for the flames from those arriving late, like people from the west coast. They claim they get lousy rooms because all of the good rooms were taken by the early arrivers.
I'm glad you were pleased with the choice of "ready rooms". Room ready gets a big thumbs up from me as well.