As per the information available from Stephen of Microsoft Kitchen website, the codename for the next version of Windows is “Windows 8”, and there is a three year gap between the current server release and the next server release, which means it’ll be released in 2012.
I think Microsoft will follow their old release cycle of …

Windows 8 Superbar is a brand new Windows 7 visual style for Windows Vista SP1 (x86). It is developed by mufflerexoz, member of DevianArt. The beautiful Windows style features double-sized taskbar with functionality similar to Windows 7 Superbar, transparent start menu and Windows 7 styled clock.

Download Windows 8 Superbar