While it might make sense for BioWare to also support voice controls in Mass Effect 3 via the PS3's PlayStation Eye or a USB microphone, the game's developers say they aren't planning to support anything but Kinect at this point.
Mass Effect executive producer Casey Hudson says BioWare is bringing voice commands to Kinect and Xbox 360 because Microsoft's sound and motion-sensing controller is doing the hard work of voice recognition. Kinect's internal hardware is what makes it possible, not just its microphones.
Mass Effect 3 is scheduled for release on PlayStation 3, PC and Xbox 360 on March 6, 2012.
We'll have more on Mass Effect 3 from E3 2011 soon.