Calling it a dark age is a bit of a stretch, but I do agree that society will change dramatically thanks to technology, population, and our fast paced culture. Just not in a way where information suddenly becomes exclusive to only a select few groups. There aren't many who seek out in-depth knowledge but that has always been the case and that knowledge will always be available somewhere on the internet or elsewhere unless something catastrophic happens.
RE: The Idea of a New Dark Age