well, older games (such as deus ex) have implemented bumpmapping and the effect is tremendous. The world map with bumpmapped textures, weapons, enemies, player models, etc... could all be outfitted with bumpmaps. Obviously this would only apply to custom content, the stock textures and materials would not show them by default. Not sure if it is even possible due to the fact that the game has static lighting, so most bumpmaps would not really change depending on angle of viewing. Still, i thought it might be interesting.
Just a question.
lee