210 votesJason Alls commented
I am very fond of Visual Studio, and prefer it to all other IDEs including NetBeans, Intelli-J IDEA, and Eclipse. It would be so nice to have FULL Java support for writing Swing/AWT apps, Java web services, Applets, Servlets, JSP and JSF applications. And it would be especially nice to be able to write Java FX applications as well. The big bonus would be to write in Java, and have the option to compile to either the .NET Framework (I was very sad to see J# dropped, as I really liked this .NET language), or the Java Virtual Machine, and then have full running and debugging capabilities for both target platforms.
This addition would benefit .NET developers who need to support Java applications, Java developers just doing Java for the Java VM, and Java developers who want to target the .NET Framework but don't want to learn a new Language. It would also be beneficial to students on computer science courses learning Java programming, such as those at the Open University. Such students would then be more likely to stick with Java, and they would be able to be .NET developers and Java developers. What a bonus this would be!
7,715 votesJason Alls commented
XAML and C# is by far the easiest way to develop nice and functional user interfaces. Microsoft will win BIG, by providing this capability across Windows, Linux, iOS, OSX, and Android. UWP is not true UWP until it covers all devices and operating systems.