"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
AirPods and AirPower: Everything We Know
More on Phasing out OS 9, and Pinot (10.3)
A tweak to new models in its Macintosh line of desktop and portable computers will prevent booting into Mac OS 9, sources said, leaving the Unix-based Mac OS X as the sole operating system.
Spymac provides some further details and confirms that 10.2 will not ship with OS 9.
eWeek also references "Pinot" as the next major Mac OS X update after Jaguar.