Unpopular opinion... but I think this is a too limited view of the web. My contrary opinion is that the actually important feature of the web is the URL, and the important feature of the browser is that it provides a sandboxed platform for running untrusted code without a builtin "walled garden moral police". It would be nice if operating systems would be exactly that, but for some reason "commercial" OS vendors are…
No one's delivered? There were and are plenty of platforms for full apps on the web. All of them require: loading each time or elevated privileges above the normal browser. This is not the reason they haven't taken off. Security isn't the reason either. It isn't used because it's just not how the suppliers of content nor consumers of the web want to use the web. If they want a full featured app, they use it. Even wit…
Of course this goes hand in hand with an instant start (no dreaded splash screens please), and not having to download gigabytes upon gigabytes of data upfront.
Modern web apps might be bad at this, and browser engines might be bloated, but native apps aren't any better (even heavy web pages still load many times faster than - for instance - starting Visual Studio or Photoshop).