I dont remember any movies where there are portal guns, or commanders that can use a planet's natural resources, and matter replicators to create an army on site, or summer camps for psychics.
Every year, there's more unique ideas in games, just look at Portal, or Supreme Commander, or Psychonauts. Give it time. In the beginning, did cinema all of a sudden have this plethora of new and interesting ideas, or were many of them ripped from popular novels, and stories of the day? Hell, even today, movies rip off other movies just as much as games rip off movies. Look at Terminator, and iRobot. Or The Matrix, and The One. Hell, how many blockbusters are direct adaptations of novels, or comics? Enemy at the Gates, Lord of the Rings, Spider-Man, 300, just to name an extreme few.
Besides how many things can you say have NEVER been done before? Certain laws of probability would suggest that the farther you look back, you can find that any idea today is similar to another that came before it, in some way.