I think a great use case is for distributed storage and control of home automation products, with an open protocol on top of it. When I have lock in to one vendor and they go bankrupt, device has lost control but also my historical data.
If this was all via a distributed model, I could grant access to a new app/company to take over control.
Even if they don't close up, I could still give access to other integration partners to gain see my historical data for some kind of processing.