Granted, announcing a final film in a highly profitable horror movie franchise is not exactly an ironclad promise that the franchise will end. So if I were a betting man, and I am since I have poor impulse control, I wouldn't be too eager to lay down money that this will indeed be the last time we see a new Saw movie. Producer Oren Koules would appear to be taking the opposite bet, however, as he also told USA Today that, "It's time to stop. We have told the story we wanted to tell, and this is going to be a great farewell."
We'll just see if that ends up ringing true in a few years time. He is right about one thing though, Saw 3D does look like a great farewell. I haven't been a huge fan of the series as a whole, but I do think Saw VI went a long way to recoup my interest by keeping the absurd plot twists to a minimum and getting back to the gory basics. And it looks like Saw 3D, directed by part VI's Kevin Greutert, is keeping that motive alive. This looks exactly like what I want to see from a 3D horror movie, so hats off to all involved.