story
If tags are a way that you can definitely find and specify a given file, then tags will form part of a new, distributed file system. If tags wind-up just being half-assed, uncertain hints to where files might be, then they will form part of a new, disfunctional distributed file system. And the later case seems to be where things are going. This "hints but no certainty" approach to file location indeed works great most of the time and fails frustratingly significant percent of the time.
But even here, this is a file system even when it is often dysfunctional.