XAML is really a more powerful, flexible development platform. XAML and HTML5 will not be equivalent by any means. Compare how easy it would be to make a circular listbox (as an example) in XAML vs in HTML5. However that doesn't mean XAML should one day
replace HTML either, imo. The thing about XAML is that with its flexibility is a lot more complexity and is only friendly to use if you're an experienced developer. It also depends on a very specifically designed object framework, whereas the DOM is a lot
thanks for the comment brian, if you noticed I started a new thread to discuss this further.
Please contribute. Do we really need these two approaches to build browser based Ui's?