https://gigaom.com/2013/08/14/perchs-new-ios-app-aims-to-bring-ambient-video-presence-to-the-office/
This is a new technology where the two iPads are constantly connected and streaming. However, nothing is sent over until it detects a face looking at it. As soon as it does it will connect and allow people on both iPads to start communicating. This technology makes it easier for people to connect despite distance and that instant connectivity removes some of the barriers that people have when talking to people far away. It removes all the technical difficulties that are common when coordinating meetings and that often waste time and causes delays. I've often had issues with google hangouts, where someone couldn't connect until 30 minutes after the starting time, which shortened the amount of time we could spend discussing important matters. With lower barriers we're more likely to check in and see if someone is on the other side to talk to them, creating more time together.