Office 2013 Direct X11
I decided to try out Office 2013 today, and upon starting up Word I noticed something interesting, MSI Afterburner's FPS counter will pop up on certain parts of the program. I've never noticed this on any other programs or the Metro section of Windows 8 so it surprised me. Does Office 2013 use DirectX11 to draw sections of the the UI if available? I have noticed there are a fair number of subtle animations that could benefit from it so I wouldn't be surprised.
Here is a picture of it: