By itself it's a fun toy.<p>As part of a larger system abstracting configuration and administration tasks it might actually be useful. I could imagine mapping a RESTful system around a filesystem path and embedding it in this 'os' to leverage shell concepts to web resources. Environments like CouchDB, Riak or Node.js that are partially javascript under the hood to begin with could see even deeper associations.<p>Hell you could probably add an abstraction layer underneath the 'vm' and multiplex it to arbitrarily many actual systems, think administering a large set of memcachedb instances with a single command line. And of course you have javascript as a first-level primitive for scripting tasks that you'd use perl for on a real UNIX.<p>Something to think about anyway.