The Vendor Relationship Management (VRM) community could bring another shift as start-ups begin invading this space, switching the emphasis to managing personal data assets on behalf of users.
Similarly, Project VRM can allow such rules to be auto-negotiated as long as each party declares what they are willing to share and what they are willing to accept.
With new VRM tools, you will be able to work not only across many silos at once but to improve them by making connections and providing useful data they wouldn't get on their own.