Windows 8 developer preview's preview

Here is some screenshots of Windows 8 developer's preview....

1. Login Screen: Here is the new windows Login Screen. Nice and Clean Look...

logging in....

2. Welcome Screen: Again a nice and clean welcome screen

3. Ribbon: The file manager has new look called Ribbon. You have the choice to show or hide {ctrl+F1}..

4. Metro UI: The brand new metro UI . Mostly suitable for tablets and touch screen supported hardwares.