At E3, I had a pretty successful run at Medal of Honor: Warfighter's multiplayer. I'm actually really intrigued by the distinction being made between Warfighter and other military multiplayer shooters.
Warfighter features a buddy system that links you and another player at all times through a visible outline on your hub and several key abilities. Killing your buddy's killer will give them an instant respawn. You can get ammo and health from your buddy, as if he were a mobile supply point.
It's certainly a different take on the way you interact with your team in a deathmatch or objective game type. Having the Frostbite 2.0 engine to play around in certainly helps too. Medal of Honor: Warfighter will land on Xbox 360, PS3, and PC this October 23rd.