My "office" is a converted deep (e.g. bedroom) cabinet, with a sliding keyboard tray and some shelves sawed out. My chair rolls in and fits within it, so the whole thing can be closed off when not in use. And that's because I want a large fixed screen. I think as people stay WFH, people will find ways of packing office spaces into smaller spaces. But people will also take advantage and move further out to get more space.