Indeed, it seems that github.com/docker/docker now redirects to this. From a technological perspective it's irrelevant, but from a brand management perspective it's baffling. Did they perceive the Docker brand as tainted in some way?
By creating an independent project commercial actors in the Enterprise space can share resources, components, and standards without having to explain why they`re better than Docker even though they`re built on top of Docker.
This is a great move towards industry and container infrastructure orchestration standardization. Common APIs will go a long way to widespread container adoption.