Despite the deliberately provocative title, there is no suggestion that web apps are superior to native apps. Instead, it gives an example of just-in-time device interaction which can't easily be served by the native app model. Such a gap could incidentally be served by a web app, where the one-time usage costs are much lower.

Think about waiting at a bus stop in a city you're visiting for the weekend. You probably won't care enough to download a bus timetable app, but it would still be nice to know if it was easy enough to find out, such as via an NFC tag pointing to an HTTP URL.