Pretty cool talk, but Xaml is still not as cool as it was in WPF/Silverlight5. :P
Xaml is an object definition and serialization mechanism, not a "UI platform." It has been completely bastardized in its intent and it is still nowhere near as cool as it used to be. It used to be possible to serialize ANYTHING with it, POCOs included. This is no longer the case.
The fact that this team was seriously considering asking developers to remove bindings altogether from their xaml (!!!!) really just underscores the absolute disconnect from the original spirit and intention of Xaml.