Oddly enough...
This is interesting to me, because, as a Steinberg Nuendo & Cubase owner, I have noticed the exact same syndrome: those idiots are determined to remove every bit of color from the interface and make it a dull gray, and that would be a gray as uniform as possible. For some reason they think the app will be more usable if *nothing* stands out - including controls, buttons, and widgets.
Evidently there are stupid people at both Microsoft and Steinberg who think that the Steam Client is the ideal model for a productivity app, and that by dulling down the interface (new term there, notice!) the app will become so popular that they will end up as rich as Gabe Newell, (without, they certainly assume, having to be as grossly and life-threateningly obese).
Then again, isn't the new Win8 logo also a uniform dark gray?
Well, I don't use Visual Studio,and I am not going to migrate to Win8 from my current XP, but I am looking into ditching the Steinberg apps and migrating to StudioOne, and Digital Performer 8. Those do not seem to be intended for people who are either colorblind, or who wish that they were colorblind.
PS I notice that the folder tree in the VS screencap has no lines connecing the folders in the let-hand navigation pane - just like the new, inferior Windows Explorer! Looks just like Dolphin. What are they trying to prove, I wonder...