WWDC 2022: watchOS 9 announced with Atrial Fibrillation History, sleep stage detection, and medication tracking

Apple, at WWDC 2022, has announced watchOS 9, the next major version of watchOS coming to Apple Watch Series 4 and later, this fall. There are broadly three new updates to talk about— Atrial Fibrillation History, sleep stage detection, and medication tracking. There are some workout updates, too, in addition to four new watch faces and enhanced complications.