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Scary: Windows 8: No X-ing out of Modern Apps
One of my biggest gripes with Windows 8's Modern UI is the sheer amount of unused space by apps, as well as the lack of right-click functionality and application-close functionality (or "X-ing out" of an app). In this OS, you'd better quickly learn to use the myriad of shortcuts available to you, because you're going to need them. It's things like this that slap you squarely in the face to let you know that mouse and keyboard users were an afterthought in the development of Windows 8's usability.