Canouna from the website winunleaked.info has done it again.
He has released some screenshots from a branch of the final Windows 8 build or the RTM.
He indicates that Microsoft is in tidy mode at this point just cleaning up minor bugs and adding slight cosmetic features to Windows 8.
The most recent build is the 8518 from the WIN8_RTM branch.
Here are some of the screenshots.
Dark Black Windows 8 Bootscreen
Change the color of your windows borders and taskbar.
New tabs and buttons for IE10
IE 10 interacts with theme colors
IE 10 Metro branding
New Themes (Windows, Earth and Flowers)
Beautiful New Wallpapers