I'm a bit confused by that article. First it says the series will hew closely to the comics, then it says that it plans to be a departure from the movies (which were pretty much as direct an adaptation from the comics as you could imagine) and introduce new characters and situations. I wonder which one it is.
Either way, after the two movies, I'm not sure I'm desperate to see a Sin City series. Not least because a big part of the appeal of the comics and the films is the visual style, and I would be surprised if a TV show did anything as heavily stylised.