With HTML-native-apps you get free cross-platform support, and you get to work within a very-well supported, constantly improving and performant framework. Furthermore, if you're building a SASS-type app (e.g. where your content is primarily hosted online) then using a WebView-type component will let you instantly "upgrade" your clients and you never have to worry about old versions of your app in the wild. You better have a damn good reason to give that up.