Being in a long-term committed relationship with someone and not living in the same home is unusual, but more and more individuals seem to be doing just that – or maybe more and more people feel comfortable saying that they have a partner with whom they don’t cohabitate. People in long distance relationships have lived separately since long distance relationships started to exist, what's news are the people who live in the same area, who could physically share a single home, who select not to do so.
As an environmental psychologist, I think that people choosing to maintain separate households is a fine idea. We all communicate what we think is important about us through the way we personalize our homes. The things our home “says” about us are never clearer than when a place belongs to just one of us. Sure, people can merge their households without scrambling their messages, but separate homes makes misunderstandings unlikely. Many people in committed relationships also don't feel that their primary identity is as half of a couple but as the whole of a singleton, and in that case the mere existence of separate homes sings a loud clear song.