Since the dawn of the cellphone in the '80s, people have wondered how such technology could change society as a whole. Then they became smaller and easier to afford and people began wondering how such technology could affect the day-to-day lives of individual people.
And then in 2007, when Apple made the smartphone ubiquitous — Yes, I hear all you Blackberry stans crying out, but it was the iPhone that took the idea mainstream. Fight me. — people started asking how it would affect the children.