Guns.com has a video report on smart guns (via email from the author). The bottom line:
Politics aside, there seem to be two major hurdles facing smart guns – funding for development and the potential prohibitive cost of integrating the safety technology. Armatix’s iP1, for example, is a .22-caliber pistol that retails at $1800, more than four times the cost of a regular small caliber pistol.
I think there are a lot more than two “major hurdles”. Examples include reliability, target market, and market acceptance.