"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
AirPods and AirPower: Everything We Know
Bluetooth News at MacWorld?
The source of these rumors come from the recent Bluetooth developers conference. Similar rumors already were reported by The Inquirer on Dec 12th based on this same conference. The rumor from that article simply indicated that all Apple laptops and desktops would contain Bluetooth functionality. No mention of Bluetooth'd Keyboards and Mice.