Windows App 3.0 and Windows App WPF

I know WPF Apps has cool graphics and so on...

Why did MS split Windows Application and Windows Application WPF in VS Orcas?

1. Is Windows Application (in .Net 3.0) to support backwards compatiblity feature for .Net 2.0?

2. If I were to do a new project in .Net 3.0... should I start in WPF rather than using Windows Application?

3. Now I have an application in .net 2.0 with a lot of business logic. Will there be anyproblem for me to re-code the business logic in WPF? The reason I want to move is because I wanna do heavy graphics!

Require your feedback for all or any of the three. Thanks

Since .NET 3.0 is just an extension to .NET 2.0, not a new framework in itself, you shouldn't need to do any changes to your business logic. I haven't done much with .NET 3.0 so I can't really answer your other questions.