Moving content between different environments is a need for many big companies that have a Drupal site and content that should be created, reviewed, edited and published on different environments. Although Drupal 8 is not yet released, a content staging solution is already in the works. Dick Olsson (dixon_ on drupal.org) and I are working on this solution together and we aim to release an alpha version soon.
The content staging solution for Drupal 8 is based on a re-designed version of the Deploymodule. This solution consists of some contrib modules and depends on three Drupal core modules. The core dependencies are Entity API, Serialization and Restful Web Services. The contributed module dependencies are Relaxed Web Services, Multiversion, Key-value Extensions and (soon) Deploy.
The Relaxed Web Services module provides a Restful/Relaxed JSON API and endpoints for entities, file attachments, administrative tasks like revisions comparison, starting/stopping replication, etc. It extends the core REST API with better support for handling UUID references, revisions, file attachments, etc. This module is borrowing the API interface fromCouchDB and its Replication API. CouchDB is a NoSQL, document-oriented database.(read more)