Yeah, this might sound hypocritical after the last point, but for this technology to work well it needs to be perfect. Sure, there are instances when the system misinterprets mumbles, but there are other times when it refuses to acknowledge basic commands. It definitely needs to be more lenient. Turning it on requires an "Xbox, on" and "Xbox, turn on" won't work--which is weird, because "Xbox, turn off" is needed to turn the system off.
Why can't both work? This is supposed to be such a big aspect of the Xbox One, and it needs to work all the time, flawlessly, without needing everyone to remember hyper-specific commands. With more accurate voice commands, people will actually want to talk to their Xbox Ones. As it stands, after a few unrecognized shouts of “Xbox, on. Xbox, ON. XBOX, ONNNNNN!” most of us will give up and reach for the controller.