I watched the videos, did the tutorial, read the docs, read the tech site stories but I still don't see why I would use Habitat over the current Docker workflow and ecosystem (including third party) for building, shipping and deploying applications. Both are a type of packaging that puts the application, its dependencies and configuration in a bundle that can run exactly the same everywhere. Docker has Dockerfiles and docker-compose.yml files, Habitat has plan files (seems like a shell script, Dockerfiles and compose files are much simpler). Docker has a central repository/registry "docker hub", habitat has depots. "docker run redis" == "hab start core/redis", etc... etc...
The docs/articles say habitat apps can run in containers, but why bother if your app can already be run in a container that achieves the same thing with even greater isolation (cgroups). Why put a self contained app in a self contained container application?
I'm not trying to put down Habitat, I'm trying to understand its role. As I currently see it, why would I choose this over the more mature Docker environment with a massive established ecosystem and user base?
Again I'm just trying to understand what I'm missing, if I'm missing something please point me in the right direction.