It could potentially be a huge victory, several other circuits (3 on the east coast- surprise) have ruled the opposite way. The only way to resolve conflicting circuit court rulings is for SCOTUS to decide the issue. Pretty much the same SCOTUS bench that gave us Heller v DC could hear the case and a SCOTUS ruling in favor of the right to self defense existing outside the home would turn federal, state and local gun control laws on their heads. The 9th ruling is big and it opens the door to a huge decision by SCOTUS.