"Can you imagine the Head of the Royal Institution suggesting that time spent by children reading and writing online in their bedroom was damaging their brains and cutting them off from social interaction?"
Susan Greenfield, neuroscientist and head of the Royal Institution, has warned that young people's brains may be fundamentally altered by Internet use. See here for yourself.
I would say that, yes, it is a worrying trend that nowadays children/youngsters simply spend too much time in front of the computer screen gaming instead of "socializing" (eg. going out with friends) and playing sports. But reading ?