The upcoming WoW Addon Cataclysm has an experimental DirectX 11 path. PC Games Hardware shows you how to enable the dx11 renderer and shows the potential benefits.
WoW Cataclysm (21) [Source: view picture gallery]
If you participate in the beta of World of Warcraft - Cataclysm and if have a DirectX 11-compliant system, you may experience the benefits of DX11 using a modified shortcut.
To do this, expand a shortcut to the woW.exe with "-d3d11". Alternatively, open the "Config.wtf" in "\ World of Warcraft \ Beta \ WTF" and add the line SET gxApi "d3d11" (with quotes). With the experimental DirectX 11 path the visuals changes: Spells now reflect in the water or lava, so do the characters and the sky. However the pretty transitions between water and shore disappear - hopefully, this is just a bug.
What do you think of the experimental DX11 changes?