For me, the single biggest feature of the 4S is that you've now got a world-version of the iPhone 4G that is twice as fast as the iPhone 4. The potential for a

For me, the single biggest feature of the 4S is that you've now got a world-version of the iPhone 4G that is twice as fast as the iPhone 4. The potential for a 100% speed boost is reason enough for any HTML5 application developer to rejoice. Everything else is just icing on a stepping stone release.