The main problem with WP in user space is the lack of options, throughout the entire OS. Metro is the main selling point, but what is the purpose of smart phone if You can't customize it to Your liking? This is where Android simply shines compared to competitors, as everything, absolutely everything can be changed in the way of the look and functionality. Neither Apple or Microsoft are going down that road, and I see both of their platforms only as an extension to "Dumb" phones. Android is currently the only Smart Phone OS in the world, IMO.