Earlier quoted context omitted.
Exactly. “it’s just opening a browser window with no actual browser controls” : yes, due to the `display` setting in the app manifest: https://developer.mozilla.org/en-US/docs/Web/Manifest/displa... It’s similar to a `WebView` component: https://en.wikipedia.org/wiki/WebView
Why do they use the words progressive web app, seems like a fancy term for just saving a link to your home screen. Is there some additional benefit you get besides this shortcut? Does it do things a webpage does not once it’s been added to your home screen?
But there is nothing a PWA can do that a website can’t do. It’s all about Web APIs. Take push notifications (https://developer.mozilla.org/en-US/docs/Web/Progressive_web...): they make more sense for an (PW)app, but a simple website can do them too (if given permission).
See MDN intro on PWA: https://developer.mozilla.org/en-US/docs/Web/Progressive_web..., or https://web.dev/learn/pwa/ for more info.