In this video from the Open Mic Webcast ("Traveler 9.0.1.4 Server and IBM Verse for iOS") on May 6, 2015, Paul Miller describes the People pictures, where they come from and how Important People are designated on the screens.

More information on this Open Mic session, including additional videos, the audio recording and presentation files can be found at the Webcast document for the event:  http://www.ibm.com/support/docview.wss?uid=swg27045497