Unlike the tradition where Microsoft launches a new certification to reflect a new technology launch, Microsoft had announced a few months ago that there are no plans to launch a separate MCSA for SQL Server 2014. There are no changes to the the current certification for SQL Server 2012, which is the MCSA: SQL Server 2012 certification. The curriculum and associated exams (70-461, 70-462, 70-463) remain unaffected by the launch of the new SQL Server 2014 platform last April. The credential will continue as the prerequisite to the MCSE: Data Platform and MCSE: Business Intelligence certifications.
You can find more details on Microsoft certification here.