Hi,
Thank you for the question.
Gizmox would like to implement Visual WebGui Dual Mode within the next 3 quarters, however, since the smart client market is moving towards WPF, we would like to implement a WPF rendered client as oppose to a WinForms client. This means that the development paradigm will be left as is (based on WinForms API) but the client rendering will create WPF using XAML which will support the entire set of WinForms controls out-of-the-box and will enable fully customization of look & feel using tools like Expression Blend, adding additional WPF/XAML based controls very similar to what you can do with VWG and Silverlight (using the VWG/Silverlight SDK extension).
The WPF Dual Mode extension will be included in the VWG commercial offering.
I hope this helps you understand the roadmap better.
Regards,
Itzik Spitzen