Total isolation is also interesting for some high-security applications.
I Tweeted to them and suggested that they offer -- at a possibly much higher price point -- a physically isolated server that must be manually provisioned by a human being. Any access would require multi-factor authentication followed by the actual dispatch of a person to retrieve the device.
This would be interesting for things like CA master signing servers, etc.
But the interesting point is what kind of previously economically unviable projects are now viable.