Yeah - that bothered me too. But I think Atomic is so young and the competitive environment is so fluid right now that I'm willing to do some digging. Now that the release is out there needs to be a focus on *practical* use cases for the cloud products, preferably with solid "reference accounts" / testimonials. We need people who are building containerized applications on the Fedora Docker image, for example.
I ran Atomic under Virtual Machine Manager on my workstation to test it - I verified that my (Ubuntu-based) Overview Project builds ran with an Atomic host. But would I *develop* the builds that way? Hell, no! I'd install docker-io on my F21 Workstation to do that!
One other note - while we're talking about Gnome Boxes, it would be a really great product *if* it had some documentation. You have to dig to figure out where it puts the VMs and the interface is non-intuitive at best. I delete it and install Virtual Machine Manager routinely and on my remix.