Libraries in Sweden already do this. I will contest Velo's argument and say that a library should keep both selected material from past times, as well as a wider contemporary selection. Not all books a library buys are timeless, but that does not make them less worth keeping. There is a common interest in having contemporary literature that will most likely go out of style in a decade or two, because it's popular and relevant right now. So are many video games, and thus I say it is a good call to store them.