"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
Apple Seeds First Public Betas of iOS 12.1.2, macOS Mojave 10.14.3, and tvOS 12.1.2
iPhone and iPad users enrolled in the free Apple Beta Software Program will receive the iOS 12.1.2 beta over-the-air in Settings > General > Software Update after installing the necessary configuration profile from Apple's beta site.
iOS 12.1.2 looks to be a minor update focused on "bug fixes and improvements," according to Apple's release notes.
Apple also seeded the first betas of macOS Mojave 10.14.3 and tvOS 12.1.2 to public beta testers today. The macOS beta can be installed using Apple's macOS Public Beta Access Utility, while the tvOS beta can be installed by navigating to Settings > System > Software Updates > Get Public Beta Updates.
Apple says macOS Mojave 10.14.3 contains "bug fixes and improvements," while the tvOS 12.1.2 is likely a very minor update.