The HTML5 scene is a little confused these days. Between Facebook making public noise about the fact that it was unable to accomplish some of its design goals using the new technologies and the continuing argument on the part of those who favor native apps over web apps, those who support the new standards are getting a bit of a defensive attitude.
The latest incarnation of this phenomenon came when the company responsible for supporting and promoting Qt indicated this week that it saw the HTML5 confusion as a perfect opportunity for its technology to gain a toehold.
But the fact is, even its supporters admit that it won’t support smartphone application development until the middle of 2013, which is far too late for it make a significant impact fast-evolving market.
Take my advice and stick with HTML5. If you really need speed, then that you might consider developing a native app or just dropping into native code for certain elements of your app using a hybrid kind of structure.