The movie Idiocracy is coming to life. I'm sure this tech has value with non-tech-literate people. But I think there's a certain amount of investigating that people should be capable of, that having someone on the other end of the line to show you what you need to do (or actually do for you) is detracting from the intelligence-factor. I don't know, maybe I'm just feeling pessimistic.
For the actual mayday button response, my wife tried it a couple times on her device--it worked quite well, just to see what the fuss was about. What I never quite understood is why a video of the other person needs to be shown at all? They are 'virtually' showing you what to do remotely, and can take control of your device--it's not like they hold up diagrams and signs over the video to show you what to do. They're just staring at a computer screen while they help the customer through their problem.