There has always been a split, or fracture in the "gun culture" of this nation, as the "gun culture" is merely a portion of society at large and that can be looked at as being a wise thing. An internal checks and balances as it were.
Each side working to protect their own idealogic grounds, with the opposition (if one wants to call it that) rethinking their position continuously, another evolution in the definition of freedom. Politics (as usual) at work.
Heller will not be the end all/be all. We all know that. The decision will probably state 'There exists an Individual RKBA WITH local reasonable restrictions brought about by that local People's gov't (they know best what THEY need in that jurisdiction as they are elected by the people)' or words to that effect.
We do not all march in lock step in all things. Nor should we.
Let us await the decision, assess the win/loss column (because I feel that each side will be able to claim a victory as well as a loss if the Justices are wise) then see what rift develops. How far apart are polar opposites? Or, to see the glass half full, how much closer are they now?
As xrayboy states (and others as well) there will still be opposition, future battles to wage. The NRA, JFPO, GOA, VPC, BCPGV, Soros/Joyce, Adams v. Jeffersonian, States v. Fed (as well as others) all competing for followers ($$$/power). Politicians too.
At the bare minimum, hopefully, some people who live in the Nation's capitol will now be able to legally keep and bear arms within their households, w/ reasonable restrictions applying... of course. And still there will be those who put up (what they consider) common sensical reasonable roadblocks in their path.
I hope. I could be wrong. I never forget that this is a nation that once allowed genocide, ownership of humans, lack of suffrage for 50% of the population and the constitutional amendment outlawing sale of beer/spirits... all of which have since been rectified. I'm sure each caused a split in the ranks at the time. And still we trudge on.