The effects of these influences have been studied and can be easily found on this "internet library".
Here are a few:
1. The increased intake of Sugar in the American diet.
2. The ill affects of Multi-Tasking
3. How the overuse of consumer electronics is ruining sleep patterns
4. Kids don't play outside as much or at all
So, in effect, we have a new generation that is:
less likely to play outside, interact/understand/empathize with the natural world, can't remember as much due to being able to look things up instantly online, is more likely to display symptoms of ADD/ADHD due to over-intake of sugar and ADD/ADHD drugs, has a much shorter attention span than previous generations, etc, etc.
None of this is any sort of conspiracy, but rather is due to the way technology and our modern world has "evolved" in the last half century.
To me one of the interesting things to note here is that less affluent children don't display these issues because they don't come from families who can afford the ADD-Constantly Connected-Sugar Ridden lifestyle that is now the norm in the middle and upper classes in the First World.
We are now and will continue seeing the affects of this "evolution".