Thank you for the question.
The fact that we are not going to have a webinar about WinForms does not mean that the developments is ceased or decreased. Just the opposite - we are continuing the WinForms development at full speed. We just wanted to try a bit different marketing strategy for this release. You can see that improvements are under developed by taking look at our Roadmap for WinForms. A teaser blog about RadAutoCompleteBox has already been released and it should soon be followed by one for the new RadChartView.
I hope this answers your question.
All the best,
the Telerik team