Grand Theft Auto IV: three points of view

Christian: OK, we have two topics here. One: what's a "meaningful" change? I'm not talking about this purely from a plot perspective, though you know that's my bag. I'm talking about what GTA IV offers over its predecessors - and guys smoking as you run past them with a sawed-off shotgun isn't it.

What do we see in this trailer that hints at a way forward for the series? I love this idea that the "city is a character" but I wonder if you're not just repeating something you heard from Rockstar. It sounds like it means something, but what does it really offer us?

What little story Crackdown had was insultingly stupid; it as also absolutely irrelevant to the game, which was intensely fun. When you look at Crackdown, it's very complex, but playing it is actually pretty simple. GTA's always been very complex in both its construction and gameplay. As we move into the next generation and the game gets even more elaborate, where does it go? Does the trailer offer any clues? What does that mean to gamers?