A preview video by DICE has just been released which showcases a new mode, Rush, a new map and some PC exclusive features.
In the video walkthrough we are shown a bunch of features, both visual and gameplay-affecting that are exclusive to the PC version such as; Dx11 soft shadows, Horizon-Based-Ambient-Occlusion (HBAO), an unlocked frame rate, larger battles and more.
Battlefield Bad Company 2 releases on March 2nd in North America and March 4th in Europe.