This new release is slated for April 1st 2014.
“SQL Server 2014 is the culmination of thousands of hours of hard work from Microsoft engineers and thousands of hours of testing and input from our preview customers. The result is an important component of Microsoft’s overall cloud-first data platform. The platform delivers breakthrough performance, accelerated insights through tools everyone uses and the ability to scale globally on-premises and in the cloud – letting our customers get the most from their data. “
– source Microsoft Offical Blog