Besides the risk that the system will fail when you need it most, it will also end firearms sharing between anyone.
Your spouse, son, daughter or friend can never learn to shoot with one of your guns.
If the technology were as fool proof as the current reliability of current production guns, manufactures would benefit since there would be no "family" guns and everyone would have to have their own.
I wonder if the antis would be pleased to know that the adaption of this technology would significantly increase gun sales.
Might be a place for it in duty guns since everyone has there own already.