He is an entertainer. He has been proven a fake in the sense that he is not walking from one building roof to the other. It's called illusion. Yes, a lot of editing is done later.
My issue is his overt dark occult look that draws kids into looking into magick for power. This opens doors to dark entities which is what I think is the underlying reason he was made popular by tptw.
The guy I think is pretty amazing is the one who uses NLP on people and we can see it's affects on the population.
YouTube - Derren Brown Controls Shopping Mall Visitors - With sound