You don't need us to tell you that apps have grown to become a core part of modern smartphone ecosystems. Android and iOS, the two major app-centric OS environments are growing in leaps and bounds, while a substantial part of Windows Phone 7's eventual success is expected to hinge on exactly how it matches (or betters) those guys on the app front. So, what better excuse than that to check out this concept golf scoring app from Redmond? Designed using Microsoft's favored Metro aesthetic, it really streamlines the user experience by employing "multiple