Windows 8 is under process, But you can check its new look by Windows 8 Transformation kit. Windows 8 Transformation Pack will provides lots of new features along with a newly designed interface. I am waiting for for Windows 8 but it looks very similar to the windows 7, but there are many new changes like the new boot screen, explorer, taskbar, login screen, Windows 8 Aero Theme and so on.
Check out the screenshot below:
Download: Windows 8 Transformation pack for Windows 7 here