Apple did not discuss tvOS at WWDC 2022, with the update seemingly limited to support for the major new features in iOS 16, watchOS 9, and macOS Ventura.
Unlike many of Apple's other operating systems, significant updates to tvOS tend to be few and far between. Instead, most updates it receives tend to be performance-related, intended to fix bugs and improve user experience.
Features that tvOS 16 support include the new HomeKit additions, and Apple Watch connectivity with the Apple TV hardware. Additionally, Apple highlighted its new gaming push with Metal 3, and there is limited support for that as well.
It also expanded on the HomeKit Security features added in tvOS 14, tvOS giving users the option to view HomeKit-compatible security cameras in a grid view. Users can access this view from the Control Center or the fullscreen camera view.