Eh it is in the crayola box so I'll count it.
As for dot crawl simulation, you are right, we aren't there yet but, there are more intelligent ways to do it thanks to modern technology that can speed things up. One way of doing that is with "poly crawl". We've got to assume that all modern light gun games are going to be 3d and assuming they are in the traditional style you really don't have to check a whole lot of areas. Let's say you have three zombies on the screen and the damage animation really only is divided into the arms, the torso and the head. So you've got three torsos + six arms + three heads. That's only 12 targets, so you light up the target area for those 12 zones by turning the corresponding polys a bright white, one zone after the next, top to bottom. Even the slowest modern monitor can handle that. Yeah you might have several more targets on the screen depending upon the game, but it's still doable. I mean the NES zapper basically does a more primitive version of this and they got it working on lcds buy slowing down the flashing routine slightly. There's also the option of a color sensor.... turn every viable target on the screen a specific color from a pre-defined palette all at once and all the non targets a shade of gray. If the system is fine tuned enough you could scan the whole screen with one frame. The benefit of either of these methods is that distance from the screen is no longer an issue as the whole screen doesn't have to be seen to process the results. Of course the major drawback is complication of coding. It's not that terrible though as poly picking is 3d programming 101. Hell that's another way, with old fashioned poly picking.... use the cursor to pick a target, if it's valid light it up for the light sensor to find. Shoot you might not even have to do poly picking.... having a skin with the appropriate colors on it ready to swap out on the model along with a shader to remove all lighting effects might do it. My 3d programming knowledge ends in the early 2000's though so I'm not sure.
Regardless of that in my middle age I think more in decades than years and I do think that eventually simulating a straight up dot drawl is going to be possible..... tv manufactures have hit a wall since 4k chokes bandwidth and they want to sell you a new tv/monitor every few years so I think refresh rates might be what they focus on for a while based on current trends. Why I don't know as most cinema nuts prefer 24fps films and they buy the big expensive tvs, but I guess they know better than I do.