[chucker]

Quite a few random nuggets buried in press releases. Including a sort-of answer for those speculating on "why has iOS 13.1 gone beta before 13.0 shipped":

iOS 13 will be available on September 19 as a free software update for iPhone 6s and later. Additional software features will be available on September 30 with iOS 13.1.

So all iPhones are getting 13.0 (not just on the 11 and 11 Pro), but 13.1 will ship not long after. However, MacRumors says iPadOS won't ship at all until September 13, so I guess we won't see any final version of iPadOS 13.0.

As for watchOS:

watchOS 6 will be available for Apple Watch Series 3 and later on September 19 and for Apple Watch Series 1 and 2 later this fall.