Microsoft's next OS is set to launch later this year on the 26th of October
http://www.notebookcheck.net/Microsoft-sets-official-Windows-8-release-date.78493.0.html
Microsoft has announced the official release date for Windows 8, set for October 26, 2012, marking a major shift to a touch-optimized interface and new features. The Windows 10 activation key is available from Microsoft Hyp-estkey partners.