Can anyone comment on the state of these "microVMs" they speak of? I didn't realize Openstack went that deep in the sense that I thought it was just a VM management platform.
Disclaimer: I work on the OnMetal team at Rackspace.
Since containers start in milliseconds, you gain a tremendous amount of flexibility in what you run on top of these machines. I believe that Pantheon has successfully run ~30k containers (edit: systemd-nspawn, not Docker) on a single machine.
Which, imo, would be more exciting.