Here a summary of links concerning the issue 'Why VCL.NET?':
Danny Thorpe: Why VCL.NET?
Borland: Overview ofVCL.NET?
Craig Stuntz: Choosing between VCL.NET and Winforms
Craig's article is an overview of considerations on using either VCL.NET and Winforms, reading it you might conclude that VCL.NET is not such a bad choice, because Winforms will disappear when Avalon comes in. So why bather converting your applications to Winforms?