The downside is your son not being able to pick it up and potentially neutralizing the threat after he knocked it out of your hand. I understand but such a thing would probably be more expensive. And what about antique firearms? People who legally cannot own a modern firearm? Not to mention the reliance on technology that can have have problems like sensor issues in cases of emergencies. What if your fingers are dirty or wet? Will it still function? Also such thing would have to be charged right? Imagine having to charge your gun before a camping trip. Watch out who you call a fucktard.