But it’s also important because it reaffirms that the Second Amendment protects not just guns but other weapons as well.
This should be obvious, I think: The Second Amendment protects “arms,” and the D.C. v. Heller opinion discusses bows and knives as examples of such arms; opinions in the 1800s and 1900s dealing with state constitutional rights to bear arms also mention bladed weapons; and post-Heller opinions, such as from courts in Connecticut, Michigan, and Wisconsin agree.
But some have disagreed — the Massachusetts government in the Caetano stun gun case before the Massachusetts high court, for instance, argued that Heller was limited to firearms.
The New Jersey decision should be a helpful precedent, then, for other non-gun cases (though of course it doesn’t dispose of the question of exactly what weapons are protected, and where they can be possessed).