A stream is simply a life context formed by all the information flowing towards you via a set of trusted connections — to free people, ideas and resources — from multiple networks. If in a traditional organization nothing is free and everything has a defined role in some grand scheme, in a stream, everything tends steadily towards free as in both beer and speech. “Social” streams enabled by computing power in the cloud and on smartphones are not a compartmentalized location for a particular kind of activity. They provide an information and connection-rich context for all activity.

http://breakingsmart.com/season-1/the-serendipity-of-streams/