I didn’t read Breyer and Stevens dissents, because that would be a big waste of my time. But if they think that the 2nd Amendment does not allow me to have a handgun in my house.... then what’s it there for? What right does it then guarantee? Do they answer that in their dissents?
As I've posted elsewhere, I think a fundamental right that no one talks about is the right to self-defense. I think it was so self-evident that the general populace could protect themselves against criminals, savages, and wild beasts in 1776 that it wasn't specifically spelled out for the obtuse generations to come. If criminals are armed, self-defense requires arms.
Also discussed by the founders was the need to bear arms against potential government misconduct, but that's not the daily issue facing most Americans, and hopefully it won't ever be.