Right now I'm reading The Shallows: What the Internet is Doing to Our Brains by Nicholas Carr. He wrote an article for The Atlantic magazine a few years back called “Is Google making us Stoopid?” and this book is essentially an elaboration on that.
Carr is a technology writer critical of how the Internet may be affecting the way we think. Our heavy-duty usage of the web may be essentially rewiring our brains, he argues, and he makes a pretty convincing argument.
I automatically think of the availability of internet and facebook for kids to use for homework. When they research, they're not breaking out the encyclopedias gathering dust at the library; they're going online where everything is “scan-able.”