I'm a game art student at the art institute of Atlanta.My ultimate goal in game design is to have people anticipate the story more than they anticipate the game. As a storytelling medium it has more story telling potential than any before it we have seen the first tentative steps in this direction from bioware but i want to push it even further.
Overdetalisation. Mapping and texturing will be extremely hard. Also lots of this details will be impossible to see in HW2. AmDDRed was right - some of details can be done with textures.