Evolence is the first collagen-based filler to get this “12 month indication”, and you can bet that it will be featured extensively in future marketing.
What is not yet clear to me, however, is whether Evolence really performs significantly better than some of the other available filler agents (which currently have the older “6 month” label from the FDA) at 12 months after injection. There is data, for example, that Restylane also has significantly lasting effects well beyond their 6 month label.
I expect Allergan and Medicis (makers of Juvederm and Restylane respectively) will be submitting their data to the FDA, hoping for a similar 12-month approval, if only for competitive marketing purposes.