I must say however, I dont like the pod concept too much. That locks you in a bit.

They didn't make it up, it's straight from Kubernetes. Presumably the Docker team will wind up incorporating something similar soonish, as well.

That said, it's basically a fancy pants way of saying "we are going to run multiple processes in the same namespace", and if you're using runit like so many people are, you're already doing it.