The giant company released the RC build (Release Candidate) of Visual Studio 2015 Update 2, focusing mainly on stability and user's feedback received via the Update 1 RTM channel. Microsoft marked this as "Go Live", though it is still under prerelease and has few known issues.
If you want to explore the new changes, read more to find the download links as well as the link towards release notes and a list of bug fixes, known issues.