* Will you have a freemium model? (Free for opensource apps.)
Yes, there will always be a free way of using Fuse and Uno.
* Will you change the name like others have suggested?
No :)
* Will you consider a no-JS model to develop?
Yup. We have that already. You can use Fuse with just Uno if you like, JS is an optional component. However, our main focus is on creating a very rapid and streamlined development workflow with UX+JS.
UX markup is not directly related to XAML, allthough it is based on much of the same principles. UX markup is designed to be much less verbose and more compact. It is not very strict Xml, it prefers expressiveness over Xml conformance. Xml namespacing is supported though :)
UX with the Fuse libraries offer pretty much the same layouts as xaml, including Grid.
Uno is not .NET based at runtime. Uno is translated to C++ and runs as native code with no VM.