If the court wants to be arbitrary, though - they can say that "smart" handguns fall under the class of guns called handguns. Since the smart gun POS is available, a class of guns in common use (handguns) are not banned.
It's complete BS, but then, look at Woollard.
Didn't Woollard directly violate Heller by saying because you have long gun carry that bear arms is satisfied?