It was from slides in a deep learning CMU course with examples such as walking into a restaurant with group seating where staff immediately knows your name and preferences/allergies, and you immediately have information on what topic each table is talking about and in what languages (which are automatically translated) what seats are free to sit at, which order is currently being cooked, ect. The idea was a scenario where each room you walk into your device can tell you everything there is to know.

If you do a search across his blog there's various articles touching on different parts. Here's one such:

http://calnewport.com/blog/2012/11/21/knowledge-workers-are-...