I should have been more specific. There's no technical reason for binary apps to be the dominant form of apps on phones, given that most apps are pretty simple experiences.
No technical reason, but I don't see iOS and Android settling on a standard framework for doing native applications and setting a specification for frameworks (localization, camera capture, audio playbacks, and other apis). The web is great, but only when you treat each page as a documents (interactive). Anytime you break out of this, you find yourself in a whole suit of problems as there is no easy way to fit both experiences in the same application (responsive design is not the solution).
