Future of work is the umbrella term for how working patterns are changing: hybrid and remote arrangements, flexible hours, distributed teams, automation and AI. It is a description of a direction of travel rather than a fixed destination, which is why definitions vary so widely.
For the people who run offices it narrows to a practical question. If attendance is no longer uniform, how much space do you need, on which days, and how do you prove it? That is answered with booking and occupancy data rather than policy documents, which is why workplace platforms have moved from a convenience to the system of record for property decisions.