While the original movie was undeniably ground breaking, the TV series has gone so much further into the world of Section 9.
This is what you expect a show to do though, and it is understandable that really building a full world in a film alone is hard to do. But the show goes abut developing the characters, and adding new ones and generally making things more engaging.
This series is one of the best Sci-Fi series I've ever seen, and one of the best done anime I've seen in general. I've seen this show more times than I can count. The show is a joy to watch because it takes time to fill the streets with interesting people and plots that pull you into the story. Stand Alone Complex doesn't do anything new or weird, and this allows it to keep the story in focus. That and it has one of the most well done romances in an anime without detracting from the plot.
Sometimes I feel stupid for caring about this series as much as I do. But most of the time I'm devastated knowing I'll never love any anime as this one.
The questions it raises are incredibly relevant today and will continue to be in the future.