It should be available to our cops on the street. Cops are killed with their own guns. That's why departments teach Handgun Retention techniques. It's also true that home gun accidents are a concern. That's why gun safes are on the market.
Education does an effective job of reducing accidents.
Take a narrow view of the smart gun as unusable except in the hands of its owner and the idea looks good. But one very serious failing was actually demonstrated at the news conference. When the codes in the two match and they're in close proximity, the gun will fire. Then Overbury shifted the gun to his other hand, and he could not fire the pistol. With the smart gun demonstrated, they couldn't.