Microsoft has been silent about the future Operating System,apart from the leak on the MSDN Blog a long time back there has been no news about when Windows 8 will be released, though recently Microsoft Netherlands team on the occasion of first Birthday of Windows 7, has posted on the official news site ,that Windows 8 will hit the market in about 2 years time.They have also mentioned that Windows 7 SP1 would be available in first half of next year. The page via translator reads as-
The phasing out of Windows XP, Microsoft is nearing completion. In July 2010, the support for Windows XP with Service Pack 2 stops. Today Microsoft will stop selling Windows XP to PC manufacturers and the aftermarket sales of Windows Vista. For Windows 7, Microsoft Service Pack 1. This service pack is still in the testing phase and is expected in the first half of next year available. The first update of Windows 7 is the new version of Windows Live Essentials (explore.live.com) became available in mid-June. Furthermore, Microsoft is of course the next version of Windows. But it will take about two years before “Windows 8 ‘on the market. The latest news about Windows is available at www.windows.nl / blog.
If Windows 8 would be RTMed within two years then it would be interesting to see when the beta version is released,probably somewhere around June or July next year..