There's also House of the Dead 2 and some other light gun games for PC. (oh, and dreamcast worked just fine with lightguns on a computer monitor)
And the arcade lightguns always seemed to have some advantages the home ones didn't...
1. Arcade screens don't have to flash like home screens.
2. Arcade lightgun games don't seem to need calibration when turned on; though since an arcade lightgun game will only have 2 or 3 different screen sizes/types at most it could be precalibrated.
3. I've found home lightguns don't have the same precision as arcade lightguns, and can even shoot way off target randomly.
4. The arcade lightguns can tell where you're aiming at all times, not just when you shoot. (since somehow they don't rely on the screen to flash) Actually, from what I remember of the gun calibration mode in house of the dead 2 on dreamcast I think it could tell where you were aiming too, but it was very sporadic and wasn't made use of at all in the actual game. Of course, this could just be down to the quality of the lightgun; anyone know how the Time Crisis series on PS2 fairs? (I think the time crisis guns have an extra cable as well....maybe the old school serial ports of from old consoles just didn't have the bandwidth to properly support a lightgun, while the USB ports on PS2 and the USB derived xbox ports do?)