Best of both worlds: HTML5 web app and iPhone App

Why don’t developers who build HTML5-based iPhone apps (like the new HTML5 Google Voice app) also syndicate their apps in the App Store? The App Store version would just be an instance of the UIWebView Class on a canvas that displays only the HTML5 app. In other words, the App Store version is just a wrapper for the web version that essentially launches a separate browser just for your app.

Have been thinking about this for a while, that’s a good way to have apps that people pay for with the flexibility of web apps… you only need to optimize for (infrequent) offline usage.