"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
AirPods and AirPower: Everything We Know
PortalPlayer Photo Edition Platform
PortalPlayer currently enjoys a large marketshare with their current music-player based platform which is used as the basis of 80% of the current audio players on the market -- including Apple.
The new Personal Media Platform, Photo Edition, offers JPEG, motion JPEG playback with music soundtrack. Additional features include TV out, color display, USB 2.0, Firewire and Ethernet support.
Although there is no guarantee that Apple would utilize the updated reference platform, The Register speculates that it could pave the way to a "Picture iPod".