Of course all car chases are staged. The Matrix, though, is on a whole other level of fake. I loved that chase scene, but 80% of the vehicles seen in that weren't there at all. When trinity is weaving so tightly between cars it looks almost impossible, that's because it is, and she (her stunt driver, rather) was just following a predetermined path, and they added all the cars in in post production. Bullit(though I havn't seen it), the Bourne Chases, Ronin, etc, actually used real cars driving past other real cars. If you want to call that fake, then, yes, pretty much everything except Cops is fake. There's a big difference, though, between weaving in and out of staged, but physically real traffic at 100 mph, and driving down an empty highway on a motorcycle.