C++14 is a minor update over the big C++11 language update with mostly small additions and fixes. The most recent draft (N3936) was published at the beginning of March. Those developers having the time to read this latest draft specification that's likely to be final, a copy of it can be found hosted on GitHub.
For those just casually wanting to know about the C++14 language changes, MeetingCPP.com wrote a blog post recently more concisely covering the C++14 features. Among the C++14 changes are support for binary literals, initialized lambda captures, generic lambda expressions, variable templates, clarifications to handling memory allocation in C++, a [[deprecated]] attribute, a single quotation mark can now be used as a digit seperator, and various other additions and clarifications.
More details on the forthcoming C++14 update, which could be released this year, can be found on the ISOCPP.org web-site. Following C++14 is expected to be a larger C++17 update in a few years. Going for C++17 we could see a parallelism standard library for more easily and better exploiting multiple CPU cores, library support for better concurrency programming, transactional memory support, modules support, and other features.