The demo I played has three sample missions that did a good job of showing off the game, I believe. The levels show diversity, with different locations, different secondary objectives (like not causing a toxic spill) and a wide variety of different vehicle types, including cars, bikes, SUV's, big rigs, buses, helicopters and even boats. In a pinch, you can maneuver around on foot, as well.
From what I can see in the demo, fans of both Combat Racing games and the GTA series should be waiting on the edge of their seats... According the the official site, Pursuit Force is scheduled for release in March 2006.