In a recent presentation, entrepreneur, angel, and Googler Joe Kraus provided a good overview of the costs of our "culture of distraction" and how smartphones are ratcheting those costs up. Early in the talk he shows, in stark graphical terms, how people's patterns of internet use change when they get a smartphone. Essentially, a tool becomes an environment.

For those of you who are text-biased, here's a transcript.

http://www.roughtype.com/2012/05/filling_all_the_gaps.html