This might appear to be only a symbol, and it is true that what’s in between the covers is not much changed, but actually this is serious and substantial. It signals a changed and changing culture of the Catholic music world, and OCP is nothing if not market savvy.
Gregorian chant here has the main place on the book cover. Next step is giving it the main place in the actual music of the liturgy.
It's also on the cover of the new Music Issue.