The only justice who got this right was Thomas.
You're the second one who's suggested that today, Rush Limbaugh being the first. ;) Well, he didn't suggest that Thomas was the only one, but he certainly quoted Thomas the most. It'll be interesting to hear how the various commentators on the left and right interpret the four dissenting votes, although I expect the responses will be similar to those regarding District of Columbia v. Heller (2008).
Anyway, I haven't yet had a chance to read all 214 pages of McDonald v. Chicago, so I can't offer much in the way of commentary on the opinion, but 5-4 is better than 4-5. So far, it's been a good year for weapons-related rights, but it's a shame that free speech isn't being protected with the same enthusiasm (Holder v. Humanitarian Law Project).
RE: Justices extend gun owner rights nationwide.