Well, since we have no Unreal Tournament demo to play (yet), we can all head over to PlanetUnreal and check out thier preview with the level design team over at The Collective talking about their project, Deep Space 9: The Fallen, which is based on the Unreal Engine. Dig it:

ADecay: Originally, Unreal was a bit limited as to the number of polys that could be used to render a scene. With the new LOD added (as well as the fact that the average machine has become faster since the Unreal's release), do you find that poly budgets for scenes have increased? Or have you developed different and innovative ways to obtain the intricate details necessary in ST:DS9? Myscha: The Unreal Engine is much faster now than it was when the game Unreal shipped. You'll notice this right away when Unreal Tournament ships Tim Sweeney and Erik have really jacked up the juice on the engine. For Deep Space 9, we'll be using the Unreal Tournament code base, but have added lots of our own in house specialization to get even more out of the engine.