Are you talking about economic productivity, or social interaction? Those are two questions with potentially very different answers. Also, I think the social in

Are you talking about economic productivity, or social interaction? Those are two questions with potentially very different answers. Also, I think the social interaction argument is pretty weak. The global connectedness that comes from the Internet and smartphones is, in my opinion, a huge improvement to social interaction in the world. I'm not that fussed if I'm at a restaurant with friends and some are using their phones.