The Demo came out.. just finished playing it.
Strong story, they don't pull any blows in the opening scenes. Shepard is grounded, the Reapers arrive. It's a dash to the Normandy, husks and cannibals everywhere. War has come to Earth. You encounter a kid as you dash for the spaceport, I got the feel of Newt from Aliens as he dashes into ducting when you try to coax him out. You see him at the end of the evacuation scene
You watch as the shuttle he gets on along with admiral gets shot down by a reaper.
Then it cuts to a scene later in the game where you're trying to get a Krogan female out of a research facility.
The features they put in are pretty good. If you got a kinect, you can speak your responses to select them and use powers in combat. You can slap a warp on targets without pulling up the menu (ditto on grenades)Mass Effect 3: Special Forces Trailer