So, because the Heller decision hasn't wiped out every gun-control law in the eight months since the ink dried, it won't do any good?
Any gains we get during this administration will be difficult at best, but Heller remains the 800lb gorilla in the living room. Those who would be inclined to pass, say, another AWB, will think twice if they know it has to be weighed against a recent and well-publicized Supreme Court decision.
Heller also helped in that it brought the whole issue to the forefront of the American consciousness. You'd be really surprised how many people never considered the issue of the 2nd Amendment one way or the other until this case started making headlines.
Future cases will be weighed against Heller, and it will lead to victories. You just have to remember that change is slow, and in the current political climate, slow means glacial.
Sometimes it’s nice not to destroy the world for a change.