...like online, the console will still function if Kinect isn’t plugged in, although you won’t be able to use any feature or experience that explicitly uses the sensor.
When Microsoft first announced the Xbox One in May, it said the Kinect, which includes cameras and microphones that are always on and listening for commands, needed to be plugged in and switched on in order for the console to work. However, users would still have the option to disable the Kinect in the console's settings menu.
This isn't the first 180 Microsoft has made since announcing the Xbox One. Originally, Microsoft said the console required an Internet connection to work in order to check whether or not users were playing pirated games. Microsoft also said it would allow game publishers to essentially "lock" a purchased game to one Xbox, making it difficult to trade in or buy used games. After a huge user backlash, Microsoft reversed both policies.