I don't think it's absurd to use this for hours a day, given that for many deaf people signing is their only way to communicate face to face, and people will fi

I don't think it's absurd to use this for hours a day, given that for many deaf people signing is their only way to communicate face to face, and people will find ways to talk all day. I work in construction, I spend my days holding 5lb drills in front of me. Using the standard gesture position (forearm down) your arm won't get tired during a day. I basically live my day in the 'gesture position' often for well over 8 hours a day, always with weights in them. When the upper arm is lifted is when your arms get not so much tired but literally drained, which is what I think the Kinect will likely have to adapt to.