KBox is an alternative to other existing architectures for publishing KB such as SPARQL endpoints (e.g. LDFragments, Virtuoso), and Dump files. I should add that you can do federated query with KBox as as easier as you can do with SPARQL endpoints.
OK, but I still fail to see what is the value of this? What's the reason why I'd want to use it rather than just start a Fuseki endpoint, or use linked-fragments?