This is the email I received yesterday.
Dear Princess Guest:
Princess Cruises recently announced it is making a significant enhancement to the main dining options found across its fleet, designed to give you the ultimate in flexibility and choice when it comes to your dining experience.
Starting with voyages departing September 14, 2024, Princess will designate separate dining rooms aboard every ship in the fleet* to three table service options:
Traditional dining offering an early and a late seating every evening
Reservable dining times
Open seating to support walk-ins anytime
To support these changes and the transition to the new system, main dining reservations that you may have already made will be cancelled.
This change does not affect anyone booked in specialty dining restaurants or suite or reserve collection accommodations, who enjoy a dedicated dining room on Princess ships, where no reservations are required.
Starting June 17, you will be able to use the app ahead of your voyage to opt for traditional seating in a dedicated dining room with the same waiter, same table and same time each night, or flexible dining, allowing you to enjoy dinner at any available time and table size of your choosing in either the Reservable or Open Seating dining rooms.
* Reservable and Walk-in Anytime Dining will be combined into a single Main Dining Room location aboard Coral Princess and Island Princess.