Murray doesn't really talk about gaming in the exact words but she mentions it in her text. When she talks about holographic images and a virtual world she could as well talk about gaming.
For a number of years a game named World of Warcraft has become really popular. It's like a virtual environment where you play a sort of Internet role-play game in a fantasy world. The game has a sort of plot that creates a story while you're playing.

Murray has one sentence in her book that says: "If we could someday make holographic adventures as compelling as Lucy Davenport, would the power of such vividly realized fantasy world destroy our grip of the actual world?" The way I understand it is that games like World of Warcraft is addictive. It takes up a huge part of some people's lives and could even make their real life suffer. Even for some people this game is their real life; a virtual fantasy world where they interact with other players who becomes their "friends." So in my opinion, yes, a fantasy world could destroy people's grip of the actual world.