You would have said the same about comic book movies about a decade ago. Movies like the first X-Men and Spiderman broke the stigma around comic books and showed the mainstream public that they are full of great stories and characters.
Video games are in the same place - franchises like God of War, Uncharted, Halo, Gears of War, and Half-Life have great stories and characters. All they need is that first trailblazing movie to prove it. My vote goes to Assassin's Creed with Michael Fassbender.