I would like to see a APP for iPhone and Android, when you can publish new items, modifiy current posts and some easy administration of our site. Almost like the official WordPress APP that is available.

Some tasks already can be made without any additional apps or features.

In a future you won't need any app at all. Browsers on mobile devises are already clever enough. They lack only a few features because of not enough hardware capabilities. However, it's just a matter of time.