The Serializer Component is being deeply reworked. It has gained some new features:

• Serialization groups: http://symfony.com/blog/new-in-symfony-2-7-serialization-groups
• Circular reference handling: [Serializer] Handle circular references symfony#12098
• Name Converters: [Serializer] Name converter support symfony#13120

I'm also working on making it a first class citizen of the framework (registered with the DIC and usable out of the box):

• [FrameworkBundle] Serializer groups support symfony#13107
• Serializer groups support symfony-standard#764

The next step will be to create a book entry (similar to the validation chapter) presenting basics and common uses of the Serializer with the full stack framework. We already started to discuss about that here: #4692 (comment)

What do you think about that? cc @wouterj @fabpot @Tobion @lsmith77 @Seldaek