I seen better Vegas graphical on GTA.San Andreas and on the up coming GTA.V trailer.
This is washington DC map.
This is the IRL metro on 2008: http://www.joystiq.com/screenshots/fallout-3-metro-ads/1083945/#/6
Fallout.3 can very spectacular depends on how you manage their plugins, settings, difficulty, realism, real life brands, music, Navigations, private audio visual user interfacing and the creatures switch. Like Switching all CRRadroaches into Xenomorph Aliens and the Zergling swarm keeps the game interesting.
I'm making more hot stuff to F3 world, private stuff this.