After more than two months in beta, Apple has released the latest versions of each of its operating systems, including iOS 10.3, macOS 10.12.4 Sierra, watchOS 3.2, and tvOS 10.2.
iOS 10.3 is probably the most significant update of the four of them. It adds support for AirPods to Find My iPhone, and you'll find weather forecasts in the Maps app. You'll also get the new Apple File System, although this isn't exactly something that you'll notice while using it. There's a Podcasts widget, and you'll also find CarPlay improvements.
The biggest new feature in macOS 10.12.4 Sierra is Night Shift, which reduces the amount of blue light emitted from your display in the evening, helping you to get a better night's sleep. Siri can now check cricket scores, schedules, and player rosters from the Indian Premier League and International Cricket Council, and there's also dictation support for Shanghainese.
watchOS 3.2 brings SiriKit support, which means that you'll be able to use Siri in third-party apps. There's also a new Theater Mode, allowing you to keep your Watch from waking up every time you raise your wrist.
As far as tvOS 10.2 goes, you won't really find any new front-facing features. There's the new Apple File System, and Accelerated Scrolling support for UIKit and TVMLKit apps.
Along with the four major operating systems, Apple also updated its IDE, Xcode, to version 8.3, and macOS Server has been updated to 5.3.