That's one thing I was really lucky about with my game room. I have a lot of stuff, but was able to get most of it out in display. I do have a bunch of figures and posters that have no home. And half of my Saturn games are boxed up. But once I can get my shelving built in the living room, the black dvd case I originally had the Saturn games in will be going into the game room too. Who knows when that'll be though.
Of course, I have my retro stuff and my modern stuff split too. So the game room is only CRT related gaming. Where the living room is HDTV gaming. So the shelving needed to the game room is lessened, since it's not looking for space to hold the 360, PS3, Wii and DS stuff.