I never thought I would see the day when I agree with something that Steve Ballmer said. But he has a point. The problem is no developer has an incentive to write a universal application that runs on all aforementioned platforms. Developers will always write apps for platforms where it makes sense. Windows has a large share of the desktop market so it is a no brainer. But why would a developer care about their app working on a phone platform with limited market share?<p>I think Windows Phone is brilliant. Well-made devices and a great operating system, but the lack of apps makes it very unattractive to the general masses. Support for Android apps without needing to be redeveloped is a no-brainer in my opinion. No developer will see the value in converting an Android app over to Windows. It has to support Android apps out-of-the-box without the developer needing to do anything or no tool, no matter how great or smart it is will make developers change their tune, even if it is easy to do so.<p>At present there is no motivation for developers to develop for Windows Phone and no incentive for customers who adopt the platform. This is very much a chicken and egg problem, one I don&#x27;t think they will ever solve for as long as they don&#x27;t support Android apps.