I'm going to play devil's advocate, here:
1) Lock up your gun if it's not directly under your control (i.e., in a holster).
"But then it's not available when someone breaks into my home!"
2) Carry your gun in a proper holster, on your person. Not in your purse in the shopping cart, but on your hip.
"How does that help me when I'm in bed and someone breaks in in the middle of the night?"
I'm going to be blunt: while I recognize my own reply is somewhat simplistic and idealistic, yours is no better. There is simply no technology, today, that makes gun ownership in the home both safe and is perceived as 100% effective in circumstances where a weapon is needed for self-defense in an emergency situation.
This type of technology is a search for a solution to that problem. Is it the solution? Or a perfect solution? Clearly not.
But to imply there is no solution, or that it's a solution in search of a problem, belies a profound cynicism.
This is Hacker News. Folks, here, believe technology can solve everything, from world hunger to poverty.
But for some reason, apparently it's impossible to improve on the firearm.
it's baffling.