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Useful information, but definitely needs to be taken in context: parasitic losses of components increase exponentially with RPM, and these measurements were taken at engine redline.
I know electric fans cut losses significantly over mechanical fans, or even mechanically clutched fans. I expect the same is probably true of water and oil pumps. Those systems were designed with wide operating bands in mind, and you can be sure that being able to operate at, say, 7000rpm, with no ability to deviate from engine RPM or load, will necessarily have drawbacks.
Honda and Toyota have both gone entirely beltless in their hybrid engines, with accessories electrified as much as possible, so undoubtedly there are gains from it.
One of these days I'll take my car to a load dyno and try to quantify these things under typical cruising conditions.
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