Kelly's anticlimactic Skype call, in fact, demonstrates the effectiveness of Sidekick's "Remote Expert Mode," which allows teams on the ground to directly help an astronaut repair the ISS rather than having to rely on mere written or spoken instructions. With the HoloLens and Skype (itself a Microsoft property), the experts in question can circle objects and make annotations within the astronaut's field of view.
Or put it this way: Experts can directly point out what needs to be done rather than wasting time on questions like, "You mean the red button or the green button?"