Apps are front and center
The entirely new start screen puts your app at the center of the Windows 8 experience. With live tiles and notifications, people stay connected and engaged with your app without having to launch it. With app contracts users are able to seamlessly search across and share content between unrelated apps. You don’t need to know anything about the target app other than its declared support for the target contract – it just works, creating engagement opportunities outside of just launching the app.
Introducing the Windows Store
Not only does Windows 8 let you keep more money per download than the App Store with an 80% revenue for total sales over $25,000 USD, Windows 8 and the Windows Store also make it simple for millions of customers to find, try and buy your app from practically anywhere in the world. The Windows Store makes it easy to distribute, update, and get paid for the apps that you develop.
Using Xcode and Objective-C?
App monitoring and quality reporting