this was going to be my comment on the original comment: it's not like you have to do only HTML5 or only native, or so i'm given to understand... i'd be interested to hear more about the hybrid approach if anyone has links/blog posts.
10/90 is Phonegap/Cordova; when hybrid is viable (imho) is when you need to show complex documents; what HTML was made for. So the parts in your native app where you need to show documents with nice flowing text, images, charts, etc HTML is a good option, but then the 10/90 is usually not native/html, but the other way around.
this was going to be my comment on the original comment: it's not like you have to do only HTML5 or only native, or so i'm given to understand... i'd be interested to hear more about the hybrid approach if anyone has links/blog posts.