"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
Apple Seeds First Beta of macOS Mojave 10.14.1 to Developers
macOS Mojave introduces a new method of installing software updates, so after the initial beta has been installed using the appropriate profile from the Developer Center, additional betas can be downloaded through opening up System Preferences and choosing the "Software Update" option.
It's not yet clear what improvements the first update to macOS Mojave will bring, but it likely includes performance improvements and bug fixes for issues that weren't addressed in the first release of macOS Mojave. It also likely re-introduces support for Group FaceTime, a feature that was removed during the beta testing period. Group FaceTime, which lets you chat with up to 32 people at once, is also present in the iOS 12.1 beta.
macOS Mojave is a major update that brings features like a systemwide Dark Mode, stacks for organizing messy desktops, new Finder capabilities, new tools for taking screenshots, a Continuity Camera option for easily transferring photo scans and documents from iPhone to Mac, and more.
Should we find new notable features in the first beta of macOS 10.14.1, we'll update this post.