SQL Server 2014 CTP 2 is now out and available for download (here).
Below is a summary of the new features in CTP 2 as outlined by the SQL Server blog (here). Microsoft have stated that CTP 2 is feature complete and therefore will be a close representation of the RTM version.
Well not quite yet but the CTP1 (here) is out so you can download it and have a play. Some big changes are on the way including the In-Memory OLTP engine, ability create to Asynchronous Availability Groups to the Azure