More accurately, the Court did not rule one way or the other on registration, only noting that since Heller did not argue the point at all, that relief in this case would be satisfied by granting Heller the permit that he originally sought.
Essentially, it did not address the registration issue itself at all, it merely requires that registration is must issue instead of may issue.
***Essentially, it did not address the registration issue....***
Presuming I grant your reading, it is a slippery slope and one that will be hard to climb. Liberals are professional cheats. Give them an inch and they will take a mile.
Perhaps more importantly, now that the 2A is firmly established as an enumerated, personal right, any attempts to collect fees, require exams, etc should be treated no differently than voting rights ie poll taxes, qualification exams, etc have all consistently been struck down.
I was initially dismayed that the vote was 5-4, but on consideration, the ruling sets two very critical factors: private ownership & strict scrutiny. From this core foundation, thousands of gun laws will be successfully challenged.