Which is not really that usefull given how different usage and behavior a desktop and a smartphone app have.
Even as a former Windows Phone hobbyist developer I don&#x27;t have any interest in this API  because I think the programming model in totally wrong and too limited for desktop programming. Not to mention the UI components which are not suited to big screens.
The biggest proof of failure is probably the fact that in 4 years of Windows Runtime existance Microsoft itself didn&#x27;t bring any killer software (Visual Studio for example) on it.