Buildings use 46% of the energy used in North America. Consensus guesses are that buildings could reduce their energy use by a third while improving the amenities they offer, by becoming enterprise-responsive without other change in technology. Clearly the most basic enterprise interaction is what is the schedule for each room, and how many people will be using the room.
The best guesses are that half of the electricity generated each year in the North America is wasted due to poor alignment of generation and consumption...