With the introduction of Windows 8 and Windows RT, Microsoft splits its flagship OS into two distinct flavors. Examine the most important contrasts.
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Windows RT devices--which Microsoft says won't be limited to tablets, but may include laptops as well--won't run legacy x86 Windows apps such as Adobe Photoshop, Microsoft Visio Professional, and untold numbers of custom enterprise programs. With the exception of Office 2013, all RT apps will conform to the Modern UI style (formerly known as Metro). Given the platform's newness and market uncertainty, a mad rush to develop for the Windows RT platform seems unlikely--unless, of course, Windows RT slates sell like hotcakes from the get-go.