Open your phone and take note of the apps it has installed on it. How many of those apps are basics CRUD wrappers? Phones will only continue to get faster but these types of apps will stop pushing the envelope at some point. There's only so many fancy transparent swiping swooshing crap you can add to an app before you start to detract from the experience. At some point, mobile web apps will be just as performing as most native apps (we may already be there) at which point people will start to balk at the ridiculousness of having to write 3+ versions of the same damn CRUD app