What is the actual resolution of Kinect's depth sensor?

[Euphoria14]

I think they were going off of this.

Sensor
Colour and depth-sensing lenses
Voice microphone array
Tilt motor for sensor adjustment
Fully compatible with existing Xbox 360 consoles

Field of View
Horizontal field of view: 57 degrees
Vertical field of view: 43 degrees
Physical tilt range: ± 27 degrees
Depth sensor range: 1.2m - 3.5m

Data Streams
320x240 16-bit depth @ 30 frames/sec
640x480 32-bit colour@ 30 frames/sec
16-bit audio @ 16 kHz

Skeletal Tracking System
Tracks up to 6 people, including 2 active players
Tracks 20 joints per active player
Ability to map active players to LIVE Avatars

Audio System
LIVE party chat and in-game voice chat (requires Xbox LIVE Gold Membership)
Echo cancellation system enhances voice input
Speech recognition in multiple [languages]

 

http://www.crunchgear.com/2010/06/29/kinect-specs-posted-640x480-at-30fps-two-players-maximum/

http://www.gamasutra.com/view/news/29195/Kinect_Specs_Show_TwoPlayer_Limitation.php