I've actually been considering doing this lately and think it would definitely freshen things up. Most of my games are on carpet sliders but if you have a hard floor and a dolly, it's extremely easy to move games around by one's self. I don't think it's a matter of the effort, it's a question of value. If you think about it, even grocery stores move things around on a regular basis, and every few years re-do the entire store layout... there's always new ideas to try, and it's always valuable to arrange my games in positions that are more or less enticing to people.