Thanks for an inspiring article. I like your arguments for removing the classical tab bar/menus etc
I have to say I find myself naturally using reachability in iOS for literally every app — I don’t know why this doesn’t frustrate me more than it should.
A feature that I think is also worth a mention for iOS is the assistive touch menu. Toolbars like this in context with an open app could also be used to free up screen real-estate — It would be awesome to see some concepts using the touch assist menu too.