No matter where you are right now, look up and notice how many people have their heads down looking at some device or are on the phone. We are hopelessly attached to these devices.
A colleague shared that he once worked for someone who constantly typed email and texts on her smartphone, not only during weekly group meetings but also during his last annual review. There could be no clearer message that 1) the boss was not paying attention to the task at hand and 2) she had little regard for subordinates. There are also other unintended consequences of such behavior.