"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
AirPods and AirPower: Everything We Know
Apple Releases MacBook Air Software Update to Address Video Playback
Whats New in this Version
This update is recommended for all MacBook Air computers, and addresses issues with video playback and processor core idling.
Third-party software that modifies processor operating characteristics such as frequency and voltage is not supported and should be removed before installing this update.