I think you're referring to the sysadmin community - but I think the driver for this has been the search for deployment nirvana. Deployment is a much more fragmented field, so it makes sense that a good solution would find fertile ground.
Docker seems decent but I don't think I want them to do ochestration..
You are not "locked in" by Docker Inc if you are using Docker just like you aren't locked in by Github if you are using git.
A much more accurate analogy would be you are not "locked in" by Oracle if you are using MySQL. It may be true today, but no guarantee that will always be the case.
Yes but I don't have the skill, time, resources and will to maintain MySQL if and when Oracle goes evil (I mean more evil than now ;-)
This is why I choose carefully what companies / groups I depend on for my future computing needs.
Docker Inc. seems to make a lot of effort to ensure Docker is a truely open project. I get the feeling that people think that handing your project to Apache is the only way to prevent vendor lock in these days.
It has indeed surprised me how quickly a normally-slow-to-accept-new-things community has adopted Docker (even well before it was considered "stable").