"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
AirPods and AirPower: Everything We Know
Genius Recommendations Return in Renamed 'iTunes Sidebar'
As noted by MacStories, Apple late last week quietly tweaked the sidebar yet again in an attempt to offer the best of both worlds, offering both Ping and Genius functionalities in a renamed "iTunes Sidebar".
The Ping dropdown menu next to each song in users' libraries also continues to be offered, allowing users easy access to the service's functions and artist profiles.
The new iTunes Sidebar does not requires a revised version of iTunes 10 delivered via software update, as the sidebar's contents are loaded entirely from Apple's servers.