A whole set of Windows 8 screenshots have leaked, with Windows 8 Secrets co-authors Rafael Rivera and Paul Thurrott responsible for most of them, using pre-beta and alpha builds of the operating system. Apart from incorporating WP7-inspired Metro UI for the login screen (as seen above), with a cute rendition of CTRL+ALT+DEL, it looks like Microsoft is also working to integrate a Ribbon-style interface for Windows Explorer with dynamic tabs, as well as more evolved preview panes and file/context-menu systems. Related Stories More Windows 8 screenshots revealed, showing Immersive browser and Modern Reader Could Microsoft Office 2010's low initial sales be because it's not shiny enough? Microsoft begins shipping early builds of Windows 8 to key OEMs Microsoft launches free Windows Thin PC, helps repurpose old systems as thin clients While the Ribbon interface can be hidden, it is possible that Microsoft intends the Ribbon interface for just one type UI i.e., Aero Lite, and that other view styles could ideally be used with other UI types. Check out a whole bunch of screenshots below, and note, that these are from a pre-alpha build, and more often than not just give a general indication of what is to come, and in most cases, contain dummy icons:
Basic Windows 8 Ribbon style UI
The Explorer Ribbon File menu
Examples of dynamic Ribbons in the Windows 8 shell
A hidden Ribbon (with dynamic Disk Tools tab)
Various Explorer Ribbon tabs
