The way I see it is that he has convincingly portrayed staged photographs of real show cars. In other words it looks like somebody took some nice cars and cleaned them up really nice to be photographed.

Weathering definitely is a great way to add to the realism though. Adam Savage (mythbusters guy) has some great videos on Tested of using various weathering techniques to make props look incredibly convincing: http://www.tested.com/art/makers/453823-one-day-builds-adam-...

The cars are too empty. Making people is hard, but you only need to make a portion of them to be visible behind a car window, and it would really enhance the effect. No more ghost-driven cars in the middle of the road. The dreamlike quality for me is the lack of life; the sterility.

Fantastic photos though, and they do really work when it's reasonable to see no humans in shot.

and where the sidewalk meets the road surface isn't quite right.