This is where he loses me: "Though the operating system for the iPhone, iPod and iPad is proprietary, we strongly believe that all standards pertaining to the web should be open." Adobe can just as easily say: "Though Flash products are proprietary, we strongly believe that standards pertaining to what software is allowed to run on your computer should be open." It's doublespeak either way, and it's crazy to think th…
If you have to make significant changes to the UI portion of your application, why not thrown the entire thing out and start from scratch with an extremely new (less mature) technology stack that you're probably complete unfamiliar with.
I believe Netscape got similar advice in the nineties.