Vids are here
http://media.xbox360.ign.com/media/743/743289/vids_1.html
Holy shit @ the audio in the 2nd video. The chatter, fire, explosions, ricochets. Talk about immersion.
When Infinity Ward started development on Call of Duty 2 they were faced with the challenge of developing a game for hardware that was not yet in existence. They knew that Xbox 360 would us multiple cores, and to best take advantage of an opportunity they began tackling the project of programming the game for this advanced setup. The result is that Call of Duty uses one of 360's cores just for AI while a second processor is devoted to visual effects that can only be described as "next-gen." The team is proud of their accomplishments on the new hardware and we witnessed examples that keenly illustrated the fruits of their labor.
One suggestion that came straight from Activision's battle hardened consultants was the use of smoke as cover. We've seen smoke bombs used in probably hundreds of games over the past year, but this instance deserves some special attention. The particle system in Call of Duty 2 is capable of producing effects that are not simple visual icons, but directly influence gameplay. In previous games a smoke bomb usually releases a wisp of cloudy, polygonal mist that results in a temporary loss of AI for surrounding enemies. The smoke in Call of Duty is a dense, palpable fog that can completely obstruct visibility over a large area. Drop a smoke canister indoors and it becomes difficult to see the muzzle on your rifle.
What really sets COD2 apart from the long line of military shooters that have preceded it, is the behavior of the opposition. The environments have been expanded to include multiple pathways and goals that can be approached in any order. Because of this freedom the AI has to be aware of targets and adjust their tactics to meet players from any direction. They flank, take cover, and know how to keep their heads down after players miss with a pot shot. In the split second it takes to lob a grenade and route out some enemies there were numerous occasions where they had come to the same conclusion about me and plunked down a pineapple at my feet. Their tactics are varied enough to make the game feel like an original WWII experience.
In our time with previous 360 games, our technical observations have been mixed at best. In this case COD was running at a smooth clip in 720p. After playing the PC build, it was difficult to find any major differences between the two versions- a good thing indeed.