"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
AirPods and AirPower: Everything We Know
More Photos from Macworld Expo 2007 Setup [Updatex2]
The "Welcome to 2007" banner that was previously posted appears to be real with another angle as well as a vertical banner of the same.
Apple's booth is shrouded under black cloth to hide whatever announcements may be coming.
The full series of photos can be seen here.
Update: More photos posted by Macitynet.it.
Update 2: For MacRumors readers who are visiting Macworld San Francisco, there is a meetup planned amongst forum members. Tuesday, Jan 9th at 3:00pm: location / time