Sources: Microsoft [download], [press release]
quote: Windows 8 ships with (virtually) everything that’s included in Windows 7. It uses the same deployment and management tools, runs the same applications, and it even runs better on the same hardware than does Windows 7. This is all awesome news. Once you understand this, and once you get over the Start screen or at least come to accept what Microsoft calls its “twin” user interfaces—Metro and desktop—you can more clearly evaluate those new and improved business-oriented features and realize, perhaps, that it’s not a shabby update at all.