For now, it mostly wraps existing UI frameworks yes. In the future if Apple decides to, they can depreciate AppKit and UIKit without changing the SwiftUI APIs a

For now, it mostly wraps existing UI frameworks yes. In the future if Apple decides to, they can depreciate AppKit and UIKit without changing the SwiftUI APIs and have it drawing directly. I see that as a very, very long way away though, UIKit/AppKit will be around for years to come.