I won't pretend to exactly understand Urbit, but it seems to be more or less what you're describing:

> In an Urbit world, your data is no longer trapped in a jumble of proprietary servers. Your urbit is a permanent, versioned, typed archive the size of your digital life. Even before you move your data from a Web service to a local Urbit app, your urbit can drive your account with an API or scraper.

http://urbit.org/posts/overview/