There will always be things that change how we learn and think. I am sure computers caused similar lamentation and gnashing of intellects back in the day. As did TV and radio. The steam engine. The printing press. Books.
Give the interwebs time and I am sure we will move from the currently superficial to a more substantial usage and understanding. I mean really, books have had what? 1000 years or so? Longer? Come talk to me when we have lived with and used the internet for a similar time frame and tell me what it has done to people then.
James.