Well, it would be an organization and communication tool. The biggest benefit would be that the blockchain would function as a data store for continuity and transparency. Beyond that, I would like to build apps for it to allow people to do things such as communicating with each other, taking votes, archiving important data, and other things that can take advantage of such a data store.

Think a mix of project management, mail system, and a certain degree of built in information assurance.