Windows 8 Coming In 4 Editions

Microsoft has for the first time revealed specifics about Windows 8 versions and features, confirming that the operating system will come in three, traditional desktop editions and a version built specifically for tablets that run chips based on ARM’s reference design.
Terms of upgrades, users of Windows 7 Starter, Home Basic, and Home Premium will be eligible to upgrade to Windows 8 or Windows 8 Pro. Windows 7 Professional and Ultimate users will only be eligible to upgrade to Windows 8 Pro.