The entire business relies on the gadget: It serves as remote control for the Apple TV box and upcoming HomePod speaker; it's currently tied to the Apple Watch, syncs with the iPad and Mac, and is home to services like Siri, Maps, and Apple Music. Beyond the iPhone, the company is also planning a version of the Apple Watch that connects to wireless networks and an upgraded Apple TV. As previewed in June, Apple is also preparing important software updates for all of its platforms – iOS, watchOS, macOS, and tvOS – and is likely to showcase some features from those on Tuesday.