The background has been changed to a skybox. Looks much better, thanks for the suggestion. I was originally going for a DarkPhysics demo style look, but this definitely is better on the eyes.
YouTube Video
http://www.youtube.com/watch?v=Fdt6Vjfd4FU
I sped it up at certain points, usually in time with the music, to keep you from getting bored. It shows low, medium, and high physics qualities. Does not yet demonstrate force fields, however, eventually I plan to have three different things the player can unleash against the city, all showing off force fields pretty well if all goes as plan.
On a side note: Just noticed I misspelled the thread name. If a mod would be so kind as to change the "PhyX" to "PhysX" I'd look like less of an idiot