Maybe I'm missing something here but I don't see this as being particularly useful?

It's a nice quick way to get an application running in Docker but realistically would you want to be depending upon these images in production?

The power I see in Docker is the ability to create portable images that contain everything my application needs. I don't want to depend upon Docker (the company) to figure out what these images should look like.

Am I looking at this the wrong way?