You mean web apps?
Because the web itself was fine till everyone started thinking that anything on the web must be an application. And that web must "win" mobile for some reason.
You'll understand that "some reason" when you'll want some cool, fancy, useful app and the vendor will have not developed a version for your current mobile OS.
Web apps have been the default approach for over a decade now. The O.G. vision of the web / netscape was to have a virtual OS, platform independent. I think it's time to lay the idea of the webapp as somehow being this alien thing to rest...