Microsoft yesterday released the new Visual Studio Preview Program. It is similar to Windows and Office Insider Programs.
Visual Studio Preview Program will allow its users to try the latest features coming to Visual Studio before its Public Release. The good news is that Visual Studio and Visual Studio Preview can be installed side-by-side on a single device. If you are using Extensions, you will need to reinstall them for each instance of Visual Studio.
Installing both will not increase the size of Visual Studio Installation as both will share some of the components.
Like any other pre-release versions of Visual Studio, it is not supported in production environments. User should install the release version for using Production Environments.
For more details on this, go here
Stay tuned for more.
Source: MS Poweruser