"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
AirPods and AirPower: Everything We Know
Apple Announces WWDC 2008 (June 9-13, 2008)
Apple has announced the dates for the Worldwide Developer's Conference (WWDC) 2008. The event will take place on June 9-13, 2008 in San Francisco, CA at Moscone West.
A landmark event. In more ways than one.
The groundbreaking innovations of Mac OS X Leopard and iPhone OS offer two revolutionary development platforms for developers and IT professionals. Immerse yourself with information-rich sessions where Apple engineers go in-depth on the innovative technologies that power the features of these sophisticated platforms. Bring your code to the Labs and work one-to-one with Apple engineers, applying development methods and best-practices you gain from sessions to enhance your application
The developer invitation (pictured above) depicts two bridges representing Leopard and the iPhone OS.