During the 2014 United States Army Annual Meeting and Exposition a defense contractor revealed a new turret system for the Bradley. At its core is the XM813, which is a larger 30mm cannon and has been linked to a remote weapon station (RWS).
What's the difference? Well, the first one is that there's no longer a man in the turret. The aiming is all done by remote control using advanced and very accurate optics. The highest point on a vehicle is usually the first one struck in battle, so by removing the man from up top, the new system affectionately takes him out of harm's way. The 30mm round is also much heavier and means the M2 Bradley can go from being used as a suppression tool to a killer.
The XM813 has an auto loader and uses linkless rounds. An air burst function is also being tested that can deal with enemies that have frontal cover but are out in the open or for deforestation. When will the M2 have the new 30-mill? It's still a prototype, but according to Amry Reco, there's full endorsement from top brass.