[quote name='CoffeeEdge']Um, okay, what are you guys talking about? A couple of you are expressing doubt that it's a "light gun." If that ain't a light gun, then what the hell is it, prey tell? Please, enlighten me.
[/QUOTE]
Light guns sense light from the screen, thus they are very accurate as to where you are aiming.
The Wiimote isn't as accurate, if you notice moving the cursor around the screen, it's seldom ever exactly where you are pointing on the TV, especially if you have a big TV. It's fairly close but not spot on.
Thus to aim, you have to have a cursor on the screen (think the red dot in Zelda) to be able to tell where you are aiming. Unlike a light gun where you can just aim with site on the gun etc. with nothing on the screen.
All the Zapper is, is a shell for the Wiimote and nunchuck, so it won't be a light gun. All it will be is a different way to aim the Wiimote and move an aiming cursor/reticle around the screen.
To many, that's not as appealing as a true light gun as it takes the challenge out of aiming, which was the appeal of light gun games like Duck Hunt, Point Blank etc.