I am already looking forward to the labyrinths that they will be setting up in front of the gates, once this really kicks in (and is meant to be handled efficiently).
Hopefully, this will make boarding actually faster, because where's the fun in boarding first, if then you have to endure one hour in your seat, before all passengers enter a tiny A319? (yes, I know, you are free to board last, but, especially in SCL, with the "new" longish walks, this is often a little risky).
And wow! Huge perk for the handful of Blacks and Black Signatures remaining after 2019: they will now enjoy priority over the Business, Emerald and Sapphire plebeians.