The "death of the file" is a really mixed bag. The replacement is walled gardens with no privacy, control and perhaps even ownership of your data, questionable security, and the potential that your data could vanish if one is acquires or goes under.
What I would love to see is the death of the walled garden, but then again that's probably a pipe dream.
I don't care if I'll be the last guy on the planet to self host his stuff but I can't see moving my email, my files or anything else off into the cloud. Outsourcing responsibility over my digital storage seems like asking for trouble.