R2015 is expected to be released in March 2015.  If you are a current Matlab user upcoming changes for platform support may impact you.  R2015b will be the last release of the 32-bit version of MATLAB for Windows. MathWorks releases subsequent to R2015b will not be available for the 32-bit Windows operating system. To use releases after R2015b, impacted users are advised to migrate to 64-bit Windows at this time. They can continue to use releases up through R2015b. MathWorks technical support engineers will continue to provide support for those releases on 32-bit Windows.  

Important:  Platforms being Dropped

Windows XP and Windows Vista:

R2015a is the last release supporting Windows XP and Windows Vista and their server variants, Windows Server 2003 R2 and Windows Server 2008. Support for Windows Server 2008 R2 will continue. Impacted users are advised to migrate to a newer release of Windows at this time.

32-bit Windows:

R2015b will be the last release of the 32-bit version of MATLAB for Windows. MathWorks releases subsequent to R2015b will not be available for the 32-bit Windows operating system. To use releases after R2015b, impacted users are advised to migrate to 64-bit Windows at this time. They can continue to use releases up through R2015b.

OS X 10.7 (Lion) and OS X 10.8 (Mountain Lion):

Support will be dropped as of R2015a; support for newer releases of OS X will continue.

Ubuntu 12.04 LTS:

Support dropped as of R2014b.

Support for newer releases of Ubuntu continues.

See the platform road map for the latest information on other planned platform changes to MathWorks products.  http://www.mathworks.com/support/sysreq/roadmap.html?s_v1=4412&elq_cid=1768056