Of course, we haven't seen many light gun controllers in the last few years since high-definition televisions became all the rage -- the standard gun design only works with tube televisions.
But the GunCon3 apparently works... just like the Wiimote, actually.
"For the GunCon 3, you place two markers on the left and right sides of your TV screen. A camera inside the muzzle of the gun detects the position of the markers, and thus you can use it regardless of your monitor [type]. There are six buttons on the device and two analog sticks. One of them is placed on a "sub-grip" that you hold with your left hand, and another is on the barrel of the gun."
Interestingly enough, Game Watch notes that while the US and Europe will get the gun in the orange color shown, Japan will get a black gun. Well, la ti da, Japan. At least we get the real thing.