Offices are worldwide, question is where first, I think in silicone valley and similar places AI shall occupy more space than human but to give training to AI, for maintenance and other purposes human hands will be required. Geography, Area of work, Type of work and lot other things will come into play to hold the office completely automatic. Imagine from top to bottom every chair is filled with AI Bosses and Workers without human presence, then who will work for whom?
AI is not an invention but innovation over robotics, of course its a leading technology now, but to say AI will replace human presence completely is foolish. CEOs, Companies, Non-profits, Governments, Researchers, Social Groups and all other need to think how AI can help the people in need. AI is still in nascent phase, whatever, we see today is tip of the iceberg only, it will grow and will do many jobs in future but will never replace human presence completely.
Of course in some jobs like logistics and other blue color jobs we need to push AI to work; I mean where human working conditions are not good due to work demand, in those areas we need to push AI to work. Instead of AI tutor for all class first we need AI tutor for children with special needs. Isn't it?
Responsible use of AI is need of the hour, at what scale AI will help human in true sense is remain to be seen, however, in my opinion AI and human shall work together in offices and other industries in future.