I'm so glad that everyone's brought up this whole issue with firing guns and rockets in enclosed spaces. As we all know from every single previous entry in the FPS genre, firepower is treated with the utmost realism and all the relative physics are taken into consideration. This would be the first game to feature outlandish and unrealistic treatment of modern weapons, so truly it makes it a bad game.
Are you people for real?
Complaining about a guy firing a rocket from inside a bus? It's still a FPS game for crying out loud, where doing ridiculous things with guns and explosives are right up there with science fiction movies and games having sound in space. It's just a part of them, because the rigorous tedium of modeling how firearms really work (not to mention how they really kill) tends to limit the cinematic effect, and is in wide use across movies and games. It doesn't make it correct, but to single out this particular trailer for it is laughable.
I continue to see people complaining about the plot of this game, which I suppose means that it's really hit a nerve and has generated a lot of discussion, something which plenty of game designers would kill for, so I'm glad to see that it has. Also, this is a game squarely aimed at Americans and featuring a nightmare scenario that we've luckily avoided so far. What about aliens invading the US? That happens all the time, but apparently that's more believable than a southeast Asian combine lead by a future Korean Republic over 15 years from now, in 2027.
I think it's fantastic that this game has provoked this level of discussion, since that's what good speculative fiction does, but suddenly complaining about realism in an FPS seems incredibly silly.