> Everything above is a moot point because Docker.

OpenStack does more than containerise.

Docker Inc. are racing up the stack to catch juicy value, but so is everyone else.

Red Hat, Pivotal[0] and IBM are already at the top of the stack with OpenShift and Cloud Foundry, so it's getting crowded.

But in the middle there's an awful lot of mechanism required to run an IaaS and OpenStack is the only serious opensource contender around.

[0] disclaimer: I work in Pivotal Labs.