There are a couple of different facets to this that the article ignores. The energy consumed by computers can be offset by recovering waste heat to offset space

There are a couple of different facets to this that the article ignores. The energy consumed by computers can be offset by recovering waste heat to offset space or domestic hot water heating (which is the bulk of your energy consumption in colder climates). You can do this at a building scale, and even at an urban scale with the use of district energy systems.