FWIW, I just spoke to customer support at Philips USA. They have not yet received any notice about the new 9050 hearing aid, and the rep told me they would normally be notified about a month before a new hearing aid actually becomes available at Costco.
Incidentally, @Volusiano I think some folks would consider the addition of Bluetooth LE Audio and Auracast also to be key new features of the 9050.