"To be clear though, the point of the OCP is not to standardize Docker, but rather to standardize the baseline for containers. Polvi explained that with an open standard, there can be multiple implementations of the standard. So for CoreOS, it means the company will continue to work on its Rocket container technology, while Docker will continue to work on the Docker container technology."

http://www.eweek.com/enterprise-apps/docker-rivals-join-toge...