Civ Rev for the XBOX 360 showed this. Units reflected their ethnic groups. (Mongols looked Mongolian, Romans looked Roman).

http://www.livingps3.com/wp-content/...volution-1.jpg

http://www.civfanatics.com/gallery/f...kers_thumb.jpg

http://images.google.com/imgres?imgu...26tbs%3Disch:1

Will it be this way in Civ Rev 5?