You now have generic interfaces (Dockerfile, docker-compose, Kubernetes/Rancher templates, etc.) to define your app and how to tie it together with the infrastructure.

Having these declarative definitions make it easy to link your app with different SDN or SDS solutions.

For example, RexRay for the storage backend abstraction of your container:

http://rexray.readthedocs.io/en/stable/

You can have the same app connected to either ScaleIO in your enterprise or EBS as storage.

We are closer than ever to true hybrid cloud apps and it's now much more easier to streamline the development process from your workstation to production.

I think it's pretty exciting :)