This seemingly minor feature is a big deal for app developers that work on both web apps and mobile apps. We develop a content library for the education market, and one of the most frequent questions we get is, "How can I view the mobile version of this content from here." Where "here" is the website loaded in a browser on a desktop/laptop computer. Our standard response was to use SMS or a third-party app. This solves that problem very gracefully.
I did something like this for iPhone a while back.