Vint Cerf isn't just Google's Vice President, he's commonly recognized as one of the fathers of the Internet. Cerf was "instrumental" in building the first commercial email system.
That's what makes his newest message so scary. He presented the possibility that we could be living in the "digital Dark Ages" at a conference:
If we’re thinking 1,000 years, 3,000 years ahead in the future, we have to ask ourselves, how do we preserve all the bits that we need in order to correctly interpret the digital objects we create?
He's talking about the fact that all of our digital storage tools have an expiration date. That hard drive full of family photos will croak eventually. Your Dropbox account might not survive if Dropbox's servers go down.