This. I like the look of it and it's still useful, but we need to stop abusing the word "native." Let's be clear that this is just an html framework that looks like a native app. It's still a website.

This is not the same thing as Phonegap, for example, which lets you build a native app you could install from the app store.

Again, still useful if you want your mobile website to look native, but not the same thing.