As well as showing off some campaign gameplau, EA and DICE have also shared some epic gameplay footage - usually the mode which is most played on the game.
The multiplayer gameplay footage looks to be from PC. The first thing you'll notice is the sheer amount of players, the PC version carries over the ability to have 64 players in one level from Battlefield 3. Maps are huge like expected but from this footage below it looks like you can destroy even more of map - most notably a tank falling through the road and a whole skyscraper falling to the ground.
It looks like you can now use mobile apps, a tablet seems to be used in the video, but with the app you can launch missiles to strike targeted points on the map.