The market could be for families with children in the house who want self defense, but haven't yet taken the plunge for safety reasons. I'm not sure how large this market would be.
Basic gun safety dictates that a gun is always loaded, even if your fingerprints don't match.
There's a theory behind handguns like Glocks that manual safety switches are too complicated when you're experiencing the intense response of a defensive shooting. Taking gloves and jewelry off, adjusting your grip, or the nightmare of having to screw with electronics is just asking for problems.