I haven't looked much into their technology but assuming it holds up one possible use case is un-reversible data storage.

What I mean by that is if I commit some data to the network. It gets passed to all nodes who keep a copy. The transaction that created the data has signatures so everyone knows it's me creating that data. No-one can overwrite that data.

You can do the same on most crypto currency blockchains. i.e. put data in transactions.