Mountain Lion does not play well when you have a setup that involves more than one display through external monitors. When you enter full screen mode for example, you are effectively using only one display. Similarly with Windows 8, support for Metro across multiple screens is poor at best. Instead we have virtualised desktops, fast app switching and expose to manage multiple windows. Our desktops and laptops are starting to behave more like mobile devices, and are also beginning to be limited by their constraints too. Are we seeing the continuation of a trend that dismisses multiple monitors in a consumer environment? Or will we see this support return and grow once we move past the teething stage of change in operating systems?