Not afraid to go cross-platform?
David Davis recently posted a nice review of VS 2015 mobile tools. Microsoft has recently shown what it means by mobile first. It has acknowledged its lack of leadership in the mobile device space and started to build great user experiences on iOS and Android. It encourages its developers to do so as well.
One of the biggest additions to Visual Studio is the Universal Windows Platform. The Universal Windows Platform is used to create one project and have it run on all the devices listed above. For the last couple of years Microsoft has been converging their APIs into a unified set of interfaces. With Windows 8/8.1, they were close. Windows 10 is the culmination of this effort.