For at least 20 years, it’s been obvious that the geeks shall inherit the earth, pop culturally speaking. Comic books have crawled out of the cons to dominate mainstream movie culture, “Star Wars” is ubiquitous, and now, “Dungeons & Dragons” has its moment in the sun. First published in 1974, the popular fantasy role-playing game has mostly been relegated to a punchline (or punching bag) in media (see: Patton Oswalt’s Dungeon Master character in comedy series “Reno 911!”).