I think today's children spend far tòo much time on phones, tablets and computers, and their parents are often just as bad, my own AC and GC included. Parents seem to use these devices (and TVs) like baby sitters, a way to keep them quiet so they can do something else. I think it's great that kids can do their school work on tablets and computers, but leisure activities on them should be monitored and limited.
One of our GC very rarely has a verbal conversation with us, just one word answers or nods of the head, his phone is always in his hand and he removes himself from the family group so he can play on it, even telling us to be quiet if our conversation or laughter is too loud. He has few friends and doesn't really like outdoor activities, except the beach, but even there he plays on his phone! Two other GC (not yet teens) already wear glasses because they spend so much time on brightly lit electronic devices. As others have said, I too read a lot as a child, but I don't think it damaged my eyesight or made me unsociable.