Well, I will say that State of Emergency obviously did not achieve the same status as Grand Theft Auto 3. However, even so, it did somewhat well (sales wise at least. While obviously no where near the phenominal sales of GTA3, I believe many devlopers would still be jeolous of the sales SOE recieved), and it is still a controversal game that could be the talk of the town in the movie business.
That being said, it is also true (like many franchises, whehter it be comics, books, or games) that a lot of game to movies that are confirmed to be planned, fall through in the end. Remember Doom? That franchise moved through many scripts and a few studios which in the end, resulted in nothing. So, just because there are plans for a movie, doesn\'t mean it will pull though.