Google knows absolutely nothing about "dogybutss", which, prepended with a #, is the name of an IRC channel I visited for years during my childhood. So I don't think Google is going to replace my memory anytime soon.
I also have a robots.txt that blocks them (along with all other spiders) from accessing my blog and personal files.
My prediction: Increasingly, people will withdraw from the public Internet because they don't want Google to replace their life.