We just did a podcast with Software Engineering Daily also: https://softwareengineeringdaily.com/2017/01/20/urbit-with-c...
But the blog really highlights well what we're trying to accomplish in the near-term.
It's Jboss.
If you want to be generous it's Inferno.
> Red Hat® JBoss® Middleware is a family of a lightweight, cloud-friendly, enterprise-grade products that help enterprises innovate faster, in a smarter way. The ideal middleware portfolio for open hybrid cloud environments, our products and services help you accelerate application development, deployment, and performance, integrate data and applications efficiently, and automate business processes across physical, virtual, mobile, and cloud environments.
Its bad.
Email and file sharing aren't mentioned. What can it do now?
I think it's fair to say the only reason to run this is to develop for it right now, it's not something end users have a use for.