winfuture.de has posted a number of screenshots and video of Windows 8. They claim that its Windows 8 Build 7955.
The above video shows Windows 8 logon screen designed on Metro. Also the screenshots posted by them shows the ribbon interface, updated new taskbar, smartscreen filter, metro design theme on window’s etc. Here is one of them.
As usual the UI remains in flux, but it is apparently from this version Windows 8 will both be familiar to Windows 7 users and also include many small improvements which will make it worth the upgrade.