In addition to releasing iOS 10.3.3, Apple today released a trio of software updates for its Mac computers, Apple Watch models, and the fourth-generation Apple TV: macOS Sierra 10.12.6, watchOS 3.2.3 and tvOS 10.2.2.
They're bug-fix updates focused on improving the performance and security of your devices so don't expect any significant feature changes or new user-facing features. Apple’s support document lists the security patches in macOS Sierra 10.12.6, watchOS 3.2.3 and tvOS 10.2.2.