Good question. It's hard to imagine anything meer futuristic these days, what with the Oculus Rift and all.
I think someday instead of u being able to get INSIDE the video game, ala Oculus Rift, the video game will be projected into the room u play in. That the characters will actually be able to interact with objects in the room. I've heard stories about people working on it already, but I don't think it's true. It's lovely future music, though.