I noticed this and wondered if there was a part 2 of the app showing redlining functionality with the man in the coffee shop doing a FaceTime call with another team member. Could this be a hint of things to come? I hope so.
after watching the video again this morning, I am certain we just saw hints of some new functionality we can anticipate. It looks like markup and internal chat/messaging. perhaps similar to what is possible through teamworks. I am making assumptions based on just the video, but it is an exciting set of new features!