This is what I like about GTA IV, which I think makes it next gen.
1. Plot and character development. OK, the past GTA’s had a plot, but I didn’t feel as wrapped up in the storyline or the characters. I felt the sandbox nature of the game was there in order to make up for things like that. So far in my GTA IV play, it feels like it IS more mission driven than past GTA’s. I like the branching story line, I like how decision you make and relationships you build affect later gameplay. Also, the way the chracter is developed through simple game mechanics is much more expressive than anything from the last gen GTA’s. You know who Niko Belic reminds me of? The Viggo Mortensen character from Eastern Promises. Yeah, Niko walks like a bad ass, but there is a sadness, or resignation in line with that as well. Like when Niko carjacks people, he doesn’t revel in it, its more like “this is business.” In San Andreas, it was more like thrill crimes, like in the attitude of Menace II Society.
2. Small digit manipulation. They don’t have fucking Lego hands/GI Joe Kung Fu grip all the damn time.
3. The environment is more interactive. Pedestrians are more invovled in what goes on. If you beat on someone, people won’t just run away. The good citizens of Liberty City will pummel your ass for jumping someone randomly. And then the cops come and respond to that, and they shoot everyone. Like real cops.
4. You can shoot fucking pigeons. I love this.
I’m sure more will be revealed as I play more.