That's not true at all. It's more than a web view as it supports more functionality, for example the open.spotify.com website does not supported a nested folder structure, but, on desktop I create something like http://i.imgur.com/pOMwTeB.png. It also has the integration between phone and multiple devices, unlike web, so I can control my desktop app from my phone (full control of desktop from phone, and vice versa)
