My point is that there is nothing* preventing any native app from including code to update itself. Over time, I believe that more and more native apps will do this. For example, Firefox is moving in that direction now.

* Except for in the case of iOS. Apple has a policy that apps are not allowed to update themselves. But there's still no technical limitation.

Right so we're discussing the reality of the situation, which is that web apps would have no choice but to force update (as they would be run server-side and hence the client wouldn't have a choice) and that native apps could be possibly, but aren't.