The no-install, and especially the sandboxed environment, is an argument that hasn't been discussed much here yet but which i think is a big factor to take into account. Sure, device and browser compatibility is nice but really, being able to open a news site without having to share my contact list, my location and my photo album is what makes the web a no-brainer.
If native installs could cater more for this scenario it could win some more ground, especially on windows, there you have no control at all over what goes into your machine. Android Play store and and Apples App store would also need to improve on this. They pretends to have support for it but the permission categories are all to vague, they are either all or nothing, and they have been abused to the point where nothing can be trusted any more.
Well it still exists and is actually great for distributing Java desktop apps inside a corporate intranet.
But it never caught on because it was a poor implementation of a dubious idea. It started up many hundreds of time slower that Flash, required you to context shift out of the browser, was pretty ugly, and obfuscated the fact it was getting unrestricted access to your machine behind confusing security dialogs.
I think the underlying programming language was the least of its concerns.
If native installs could cater more for this scenario it could win some more ground, especially on windows, there you have no control at all over what goes into your machine. Android Play store and and Apples App store would also need to improve on this. They pretends to have support for it but the permission categories are all to vague, they are either all or nothing, and they have been abused to the point where nothing can be trusted any more.