I am reminded of an old MASH episode where Hawkeye told a joke about a circus performer that flapped his arms and flew around the big top.... the circus bossed then quipped, "that's it? bird tricks?"
It is true that the visuals arn't as compelling as stills and animations rendered out by the top end 3d applications. BUT at pushing over 15 million polygons (which BTW the complete model cannot even be opened in 3DS MAX but can be presented in Unreal), is very compelling to a client in that he can see every nook and cranny of his project from every view....
For us, it is all about design communication .....and the 3d visuals presented in the game engine communicate design in a unique and compelling way.
You can see the 15 million poly Dallas Cowboys Stadium model at
http://www.businessweek.com/innovate...221_129534.htm