Imagine our hunter and gatherer ancestors sitting in the woods, spending hours in front of a TV watching other hunters and gatherers successfully hunting and successfully gathering berries. Their brain adapts to vicarious input, and they gain the belief that hunting and gathering is fairly structured and predictable.
They go out into the wild and find evidence that it's not as predicatable as what they saw on TV, but keep expecting it to be because that was what they were used to seeing on TV.
Also, if they watch too much TV, it's likely they will starve because there are no grocery stores.
I think this plays a part in everyones life that grows up watching TV; however while TV in the past sugar coated life, TV of the present makes life seem more unpredictable than it is in the reality of our own lives. That can lead to unrealistic expectations and unrealistic fears. Our brains adapt to whatever we expose them to, and the brain expects the future to be based on what it has experienced in the past.
With all the electronic devices that we expose our brain to on a daily basis, there is a lot of "neuroplasticity" or rewiring going on in the brain to adapt. While there is no evidence it causes autism or aspergers it's changing everyone's brain that engage in it. That's not an indictment of the activity, it's just the way science has come to understand the way our brains work. All of it has the potential to desensitize the human empathy response, increase anxiety, and increase unrealistic expectations.
Fifty or sixty years from now, studies may show all this greatly increases the chances of insanity, but from now until then we might as well continue enjoying it, because as far as I know, no one knows the long term effects all of this will have on us, other than our brains are indeed changing as a result of it, within the course of a lifetime.