Microsoft has just announced that the official release date of Windows 8 will be October 26, 2012. The news was given at Microsoft's annual sales meeting and on the Windows blog.
Current users of Windows XP, Windows Vista, or Windows 7 will be able to upgrade to Windows 8 Pro for $39.99. The Windows 8 System Build Kit will be available for an undisclosed price for enthusiasts and manufacturers. Current rumors via Microsoft insider Paul Thurrot and Mary Jo Foley are stating that Microsoft may skip over a full retail release for the operating system.