No need to get so angry and defensive.
We know that MS is using two cameras to obtain an offset images that it can use to calculate depth.
I was under the impression that Sony's solution was using an eyetoy camera, but truthfully, I haven't read much about it that wasn't present at the press conference.
I'd take Iwata's statements to mean that they had tried something like Sony's camera, that for pointer controls it was easier to use a stationary set of reference points near the TV as opposed to putting the camera on top of the TV and using a single point on the remote as a reference point. I'd assume for it to work well for Sony that they're going to have to include a gyroscope in their remote, which just wasn't available to Nintendo at launch.
I think it can also be taken that since Sony's using a uniformly sized glowy ball, that they can use it to determine depth without Nintendo's problem with having to point the Wiimote towards the sensor bar.
Lots of gives and takes in the designs, and I'm sure from a design perspective that they'd like to include as many possible points of data as they could in order to provide the best motion model, but cost has to become a factor as well.
On a side note, another interesting article has popped up. Says that Nintendo recently scrapped another gameboy successor. Probably thread-worthy.
http://www.cnbc.com/id/31084652/