Actually I do see a difference... If his 99.99% accuracy thing turns out to be real, I'd be ok with using it on a biometric safe. The difference I see is that once the gun is out (and there's multiple ways to get it out-and there will be or I'm not buying it), anyone can use it, while if you've got a biometric gun you can't use it without excellent trigger placement, with gloves, or by family member if you get hurt. While I'm comfortable with checking and replacing batteries in a safe, I'm not going to ever be happy with dealing with electronics inside my defense weapon. I love tech (it's my job), but for a firearm give me good old mechanics.