Windows 8 tablet UI may make an appearance at D9
Until now, the leaked versions of Windows 8 have not included the tablet UI, but it has been rumored that the tablet UI would feature live tiles similar to what you would find in Windows Phone 7.
Windows 8 will mark Microsoft's first attempt at an OS designed for tablets. Microsoft is the last major player to enter the tablet market, and will have an uphill battle against rival platforms: iOS, Android, Blackberry's QNX, and WebOS. The first beta of Windows 8 is expected in September and Microsoft is aiming to have a tablet on the market in Q1 2012.