Microsoft has now cleared up at least one mystery about Windows 8 with the announcement that only two versions will be available for conventional desktop and notebook PCs. (The third edition, Windows RT, is only for ARM-powered devices that are still months away from entering the market.) New PCs sold through consumer channels will mostly come with Windows 8. No fancy marketing label, nothing to say it’s a home or consumer edition. It’s a base—perfectly useful for most consumers and small businesses. What’s especially refreshing is that the list of features available in the Pro edition is short and to the point. There’s no need for complex matrixes to explain what’s in each edition (for Vista I needed two separate posts, and for Windows 7 it took me six pages, although the breakdown was more rational than in Vista).