Being that Apple released betas for iOS 11.2, watchOS 4.2, and tvOS 11.2 yesterday, it was bound to happen soon, but the company is now offering iOS 11.1, watchOS 4.1, tvOS 11.1, and macOS 10.13.1 High Sierra to everyone on supported devices.
Most notably, there's now support for Unicode 10.0 emoji characters. These were shown off by Apple earlier this year, and should include hundreds of new characters.
Another new feature that you'll find in iOS 11.1 is that the 3D Touch multitasking gesture is back. This was removed in iOS 11 for some reason, but it allows users to swipe in from the left to get to the multitasking screen, or just to switch to the last app that you used. Naturally, you'll need a phone that supports 3D Touch, which is the iPhone 6s and higher.
watchOS 4.1 has new features for the cellular Apple Watch Series 3. Users can now stream Apple Music through their data connection, or Wi-Fi, of course. There's also a new Radio app for streaming Apple's Beats 1, along with NPR, ESPN, and more. You'll find a Wi-Fi toggle in the Control Center with this update, and Apple has enabled GymKit.
tvOS 11.1 includes mainly bug fixes, but it does include a fix for the WPA2 KRACK vulnerability. The same goes for macOS 10.13.1 High Sierra.
You can grab today's iOS and tvOS updates through Settings on your iPhone or Apple TV, respectively. watchOS can be updated through the Watch app on your iPhone, and macOS can be updated through the Mac App Store.