Yes, the Windows client is evolving (could it be any other way?), and a recently leaked Windows 8 screenshot seems to be offering a glimpse of one change introduced since Windows 7 was released.
As it’s heading toward Milestone 3, Windows 8 becomes available for testing to more and more early adopters.
Illustrative of this is the fact that leaked information and screenshots of Windows 7’s successor have started to increase in numbers, although one can hardly speak of a real volume of insights into the development of Windows vNext.