One can also, however, use a string of infrared LEDs or a single IR LED from a remote control instead of a sensor bar.

When using the Wii controllers, you'll be using the same sensor bar as the Wii.

A sensor bar is not included in the Basic set in these territories.

A composite video/audio cable, wired sensor bar and power adapter are also included.

The obvious drawback to this approach is that it can only produce spatial coordinates while its camera can see the sensor bar.

The Wii Remote uses accelerometers and infrared light sensors (from LEDs inside a 'sensor bar') to know where it is in 3D space.

Included in the box is a plastic mat with two brown footprints, which helps players properly position themselves in relation to the sensor bar.

The Nintendo Wii's sensor bar uses infrared LEDs.

I think they might try something Kinect-like, with dual cameras in the sensor bar.

The camera is infrared and looks at the two IR leds in the sensor bar.