I loved the movie and have come back to it several times since watching it for the first time. Picking up some of the film/book's social/political themes, I think there are still some interesting stories to tell in that world--even without Clive Owen around.
What I liked about the movie is how it told a specific and fairly simple story against a backdrop of great turmoil and bigger issues like immigration, etc. I think that a series has potential as they dig deeper into some of the ideas that were more in the background of the film.