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I'm not sure what's actually new there. You've been able to 'install' full-screen web pages to the home screen with a custom icon since before iOS 2.0 and the original app store.

The capabilities have grown over time as Safari on iOS supports more PWA features, but the article seems to be framing this as a new ability to install apps, when that isn't very new at all.

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Service workers provide way more capabilities than just creating a shortcut. Google’s doc[1] provides a good introduction, but essentially you get things like push notifications and background sync in a cross-compatible way (chrome, Firefox, Edge, and now Safari). I’m particularly excited about the caches and sync APIs, which allows sites to be rendered and be interactive even when you’re offline or have a flaky connection.

1: https://developers.google.com/web/fundamentals/primers/servi...

I don't think Mobile Safari has push notification support yet.

Safari for iOS doesn't support background sync or push notifications.

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