Comment Waste heat recovery (Score 4, Interesting) 79
Current water-cooling typically dumps the waste heat either to the atmosphere (via evaporation of water) or directly into a body of water such as a lake, river, ocean or holding ponds. This is true of most large heat generating facilities such as power plants, as well as data center.
Having a closed loop secondary cooling circuit opens up options to recover the heat for other uses like municipal heating or cogeneration of power. Whether Microsoft is interested or positioned to do this is another question.