Python 3.4 doesn't have any new syntax features but it does have other new features, new library modules, improved library modules, and other enhancements.
New features for the Python 3.4 update include ensuring PIP is always available, newly-created file descriptors are non-inheritable, codec handling improvements, and more.
New modules of Python 3.4 include asyncio for asynchronous I/O support in the standard library, ensurepip, enum for a standard implementation of enumeration types, pathlib for representing file-system paths with semantics for different operating systems, the selectors modle for high-level efficient I/O multi-plexing, a new statistics module for core statistics support in the standard library, and tracemalloc as a debug tool for tracing memory blocks allocated by Python.
Python 3.4 also features various improvements to existing Python modules. Last but not least, Python 3.4 also ships a number of security enhancements.
At the time of writing the Python 3.4 official release announcement has yet to be issued but the new release can be downloaded right now via Python.org. Python 3.4 changes are covered via the Python.org documentation.