Here's the policy from the Member Site (no start date is given)
Until now, Preferred View accommodations could be for a view of the garden, the pool, or the BoardWalk. There is now a separate category for the BoardWalk View. Effective immediately, the Preferred View accommodations will be identified by one of the following new categories - Preferred: Garden/Pool View and Preferred: BoardWalk View. Both categories require the same number of Vacation Points for reservation of accommodations. At the time of your booking you will be able to request the BoardWalk View category and will know at that time if this is the room category that you will receive at check-in. If these accommodations are not available, you may request the Garden/Pool View category.
Member Services has already converted some existing reservations to the enhanced room categories, based on requests for the BoardWalk View and the date the reservation was confirmed. An updated confirmation will be sent to Members whose reservations have been confirmed for the Preferred: BoardWalk View category.
Keep in mind that inventory in the Preferred: BoardWalk View category is limited, so please make your vacation plans accordingly.