Microsoft released the beta version of its future system: Windows 8. This pre-version, entitled "Consumer Preview" is available for 32 and 64-bits hardware (3.5 and 3 GB). Unlike Apple, Microsoft keeps supporting 32-bits systems, while Intel and AMD have been releasing almost exclusively 64-bits hardware since 2007.
With this version, Redmond's giant expects to capture market shares on mobile platforms: smartphone and tablets. The user interface has been massively changed and unified, with a mix between iOS and Mac OS X and Linux. however, Microsoft has pushed the concept further to offer an unified system design on all platforms (desktop, mobile, smartphone, tablets). As for Apple and Android, Windows Store is now offering download and installation on applications, such as our AppStore on Mac OS X.
If you are curious to give it a try: http://windows.microsoft.com/en-US/windows-8/download