Make that "HTML5+JS+CSS is easier to develop" and "the devices are faster". Much of my consulting work is making iPhone apps faster. People seem to forget that the iPhone and iPod hardware is slow and has limited memory. I'd imagine the equivalent Android/etc hardware is about the same.
That said, if the iPhone/iPod/iPad drive mobile CPUs forward the way the iPod drove battery technology, then there's an exciting future of powerful handheld devices not that far off, and HTML5-based mobile apps will be a lot more competitive.
That said, if the iPhone/iPod/iPad drive mobile CPUs forward the way the iPod drove battery technology, then there's an exciting future of powerful handheld devices not that far off, and HTML5-based mobile apps will be a lot more competitive.