The threat comes from people treating all this as normal and trivial. In my office when I'm dealing with parents, I have to challenge the 12 hours of screen time a day on a regular basis. Everyone looks at me as if I were crazy.
Just as we practise prevention by advocating physical activity and discouraging smoking, we need to make parents aware of their role and make society aware of the fact that it's not normal for a child to interact with the screen 12 hours a day, or even 18 hours a day. It needs to be seen as an opportunity for this generation, but also definitely as a threat to family life and to the development of these children.