This is called Proxemic Interactions. This book concerns the design of proxemic interactions within such future proxemic-aware ecologies.

VMC has been touted as invaluable tool for remote collaboration, conferencing & distance instruction. This book offers 1st comp synthesis of what we know about VMC.

Yet it is also a philosophical enterprise in the way it represents the world and creates and manipulates models of reality, people, and action. In this book, Paul Dourish addresses the philosophical bases of human-computer interaction.