Both WPF and WinForms will be part of .NET Core 3.0. They've done a few demos of it already, and were able to port over existing apps without any changes to the code. This even worked when using third party controls like the ones you can get from Telerik. They just added references to the Telerik .dll's they already had, and everything just worked.
They'll still only run on Windows, but it's a nice option for teams that want to move their existing apps over to .NET Core and take advantage of the quicker update cycle and improved performance.
Re:What Makes .NET Core So Special?
by EdgarVerona on Wednesday November 21, 2018 @08:59AM
(#18502676)
Awesome, glad to hear it!
I don't know about the current status of the GUI layer, other than that I've heard plans for WPF to be ported over to .NET Core. I don't know if or when that will actually happen.