To the undiscerning eye, the latest Window 8 blog post was just that, an article revealing a little more about the future of the OS building up to the great reveal at the BUILD conference in about two weeks from now. I on the other hand was happy to finally see evidence that the Windows 8 Shell may actually be updated from the current Aero glass look to a more flat metro look.
As you can see from the image above, the fonts and styling are more akin to the Zune/Windows phone 7 feel. The only remaining vestige of the past are the gradient shadings on the buttons that I hope they get rid off. The final mockup (shown below)unfortunately IMHO reverts back to the Windows 7 design. I hope they are just keeping the revamped UI secret until the conference. Watching the first Windows 8 video was quite jarring when they switched between the new touch based UX and the old Windows 7 shell. Updating it to Metro should unify the experience. I hope the update goes beyond the shell to cover all the Office Suite and Windows Live Essentials programs as well. (click on the source link for more images)
source: Windows 8 blog