hmmm.. I haven't read the opinion yet, but in interpreting the Second Amendment which states:
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
"A well regulated Militia, being necessary to the security of a free State," is a "prefatory clause," the remainder of the amendment is the "operative clause."
I would be very surprised if SCOTUS did not interpret the 2nd Amendment as a whole and held the prefatory clause did not limit the operative clause and that the intent of the framers was not to protect militias per se, but instead, the prefatory clause is in fact an absolute clause, stands by itself, is not and does not modify the operative clause and as a result, the 2nd Amendment consequently, addresses two constitutional rights... (1). the right to have a well regulated militia and (2). an individual's now, absolute right to bear arms.
hmm.. on the other hand, not being a constitutional law attorney, I could not know what the hell I'm talking about.
edit.. well crapola.. apparently all they did was extend the Heller decision from 2 years ago to state and local laws and did not address how legislative bodies can reconcile gun control laws with 2nd Amendment concerns. They left that for another day.