I mainly use Expression design to export vector drawings as XAML for resource libraries. I just found out however that none of the XAML it exports is valid for WinRT development. There isn't even a way to draw <DrawingGroup> in WinRT. Will Expression
Design be updated to export WinRT friednly XAML or am I missing something here?
As far as I'm aware, you've never been able to export a Silverlight resource dictionary, and WinRT is built upon the Silverlight XAML model rather than WPF's XAML model - so you have to export to some Silverlight compatible option.
(As an aside, WinRT on the managed XAML side is basically the next version of Silverlight - though they seem to branched off from Silverlight 4 rather than building upon Silverlight 5)