Lullabot: Decoupled Platforms: Contentful vs. Drupal

Many platforms are advertising the ability to manage content in one place while publishing it to multiple channels. They provide a way to model, manage, and create content and then expose that content via an API. 

These are decoupled-only (or headless) back-ends. The only way to present your content is to create an application that consumes the API, interprets it, and renders the content in your desired format.