“I remember traffic lights before smartphones,” sighed a friend as we sat in traffic behind a car that remained still after the light had turned green. Sure enough, the driver’s head was tilted down- ward as if lost in solemn prayer-or, more likely, a texting/map/music app-a small illustration of how mobile devices have changed everyday life. What did we use to do to kill time in slow-moving checkout lines before we had Facebook or Twitter to distract “I remember traffic lights before smartphones, ” sighed a friend as we sat in traffic behind a car that remained still after the light had turned green. Sure enough, the driver’s head was tilted down- ward as if lost in solemn prayer- or, more likely, a texting / map / music app-a small illustration of how mobile devices have changed everyday life. What did we use to do to kill to in slow-moving checkout lines before we had Facebook or Twitter to distract