Yes, and yes. The things it can't do are a pain, but the things that it can do are things that are very difficult to do in a standardized way with desktop/mobi

Yes, and yes. The things it can't do are a pain, but the things that it can do are things that are very difficult to do in a standardized way with desktop/mobile. A cross-platform UI that simply works on just about any device was considered the holy grail of computing at one point. Everyone gave up on it after a while, and very quietly the web just "became" the platform that enabled such a UI, without limiting how such a UI can be created.