I'm getting tired of all this "imagine what you could do" hype. Can you really build a well designed, polished app that people want with these tools? Well, so

I'm getting tired of all this "imagine what you could do" hype. Can you really build a well designed, polished app that people want with these tools? Well, so do it, release the app, make a lot of money and show us how you did it and why it's better than building a native app. As of now I never saw all this promises fulfilled, especially on the iPhone. Otherwise it's just pure speculation. EDIT: spelling and punctuation.