[youdounderstand]

UWP and Xamarin apps can use XAML, so it's not like the underlying ideas of WPF/Silverlight are dead.

[ygra]

WPF is a lot more than just a markup language for object graphs. Heck, the features I consider most essential and important to WPF (data binding, templating, and the idea that controls only encapsulate behaviour) have nothing to do with XAML at all.

[nightski]

But aren't all those features you mentioned part of UWP also?

[youdounderstand]

Both UWP and Xamarin Forms have all of that.