Also worth noting that Saleem has also been working on a wrapper of Windows GDI for Swift. While it's not a port of SwiftUI, it looks pretty similar.
That would also means you would be able to deal with WinUI XAML and all.
while GetMessageW(&msg, nil, 0, 0) {
TranslateMessage(&msg)
DispatchMessageW(&msg)
}
If by some stretch that means Swift can then make complete Windows programs, that could be good for consumers but particularly good for enterprise developers.