It is a function of tools. iPhone App have smooth animation because they run on Open GL accelerated graphics, yes. But so could Android apps. The difference is that the iOS SDK allows you to `pushViewController:animated` and that's it.

In the (pretty far I think, unfortunately) future, an SDK/Framework/Library à la jQuery will propose the same tool to run Web GL animations.

We need a UIKit/CoreAnimation for the web. The technology is not there yet, but it's going to be.