S. Somasegar on his own blog at Microsoft:
Visual Studio 2015 and .NET 4.6 are an exciting next step for developer tools from Microsoft – combining new productivity for existing Visual Studio users with new platform support for developers targeting a wider range of platforms and programming models.
Huge update to Visual Studio but most notable is the ability to write apps in HTML5 or .NET for a variety of platforms and also to take existing Android or iOS applications and port them to Windows 10 with relative ease.