why dont any games use this yet

 Hard to say. It was supposed to be an extra feature in Boom Blox, but got dropped off before its release. I think EA:s programmers didn't know how to program it. I mean, they are just regular guys, who got picked out from the gutter.

 NO gimmicks? Thats right because every ps3 ownere has an eyetoy, and will pay 50 dollars for one. While the wii one is basically free unless you only have one wii mote. That isn't to say that they can't make it so you don't use two wiimotes. 

You know this technique was already placed in a Wii game as an Easter Egg right? The game is the one developed by Steven Spielberg for the Wii. I don't know the name.

Probably because it's not use (doesn't sale) that much on the PC. Even as a hardcore PC gamer I haven't use TrackIR over a year now. I found it only useful for flight sims where a third controller (hand) in needed.

Holy shit this is old. Like... REALLY old.

It was removed just before release (Boom Blox).

Boom Blox was the name of the game.

It was a feature that was dropped in the final version of the game.

There is much speculation as to why it was dropped....we have already heard one reason on here (maybe in jest)....

A) The programmers didn't know how to do it,

B) The technology is proprietary and a patent infringement was threatened at the 11th hour,

C) EA wants to release it later as a $5 DLC

D) Nintendo (or EA) contacted Johnny Lee about implementing this tech in a future console (or console upgrade).

Any of these is possible/ likely. The most we can hope is that ultimately this technology emerges for mass consumption and that developers/publishers put lots of money/backing behind it (unlike the launch of the Wii.)