whats the biggest thing releasing this fall?

The biggest thing releasing this fall, as highlighted in the WWDC sessions, is the new OS releases across Apple's platforms. These include iOS 26, iPadOS 26, macOS Tahoe, and VisionOS 26. Each of these updates brings a host of new features and improvements, such as a new design language with Liquid Glass, enhanced Apple Intelligence capabilities, and significant updates to user interfaces and app functionalities. These releases are set to be available to all users this fall.