I have designed data centers and computer-based offices many times over the decades. I am a Google architect. For years the trend line was lower power consumption each year. However, with the current trend of more CPU power and power-hungry GPUs, that trend is no longer as true. As AI and ML begin being deployed everywhere, there will be an increased power consumption trend which might go back down in five or ten years with increased CPU/GPU efficiencies. For now, the best is to budget a per person compute workload and adjust over time as trends change.
This budget is not as simple as reading the spec sheet or nameplate. CPUs are variable speed, have low power modes, sleep modes, and full-on computing high power modes. Just like we must calculate heating and cooling BTUs by using numbers, heating degree days, R-values, etc, and not guesses, we must also actually measure what a computer uses over an extended period of time and during peak power consumption during office working hours. During nights and weekends, most systems should be configured to go to sleep reducing power consumption. It is during the working hours when people are also present that the loads must be managed for people's comfort.
Note: when we design an office or data center, we do specify the estimated power consumption of all equipment. In high-density workplaces, this is an important item to determine, for example, the minimum CFM for HVAC cooling. Assuming that equipment is ordered every thirty months in volume, the power requirements can be factored into purchase decisions. That process can provide a feedback loop to the mechanical engineering department so that they can forecast future HVAC requirements. The days of over-provisioning must go away as net-zero buildings become a reality and not a dream.
Now some will say, "but we cannot estimate or forecast what equipment will be used." In some rare cases that might be true. However, a budget would be designed and then that budget can be incorporated into future planning or, for example, a lease or purchase agreement. Just like power plants have peaker plants, modern buildings can also have standby equipment that can absorb peak and/or unexpected loads.