Biggest issue with that product, is that the kinds of careless hunters who accidentally shoot others already ignore all the current safety rules/guidelines out there today. The odds of that type of personality saying to themselves: "You know what, I'm gonna spend good money on some whiz-bang safety gadget." are slim to none. Basically there are safe hunters, and unsafe hunters. No technology will change that, it's a moral issue, it's a personality issue, it's an education issue. It is not a technology issue.
Simply following the 4 basic rules of gun safety (which have been taught the same for decades) would eliminate accidental shootings.
-Treat every gun as if it's loaded.
-Always keep the muzzle pointed in a safe direction.
-Keep your finger off the trigger until you are on target and ready to fire.
-Know your target, and what is beyond.