How will they stay true to the games? It’s not The Last of Us where you literally play through a story. Fallout is all about exploring the wasteland at your own pace and shaping the world as you see fit.
Every game has had times when I’ve sat and seriously considered a choice that had massive consequences and mixed both benefits and steep drawbacks. Like in The Pitt, where you have to decide whether to kill a baby’s parents in front of it to liberate the people enslaved there. On a tv show, they’ll have the main character… mull it over and make a decision for the audience? How do you even translate that?