On Scott Guthrie, VP of the Microsoft .NET Web Development Division , has released a new .NET Client Development (Web, WinForms, Other) Roadmap on his blog and he has some very interesting nuggets in there.
Here's the link to his blog: Click here to read it

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These are the main points of his posting, but please read what he says in detail. It's much clearer than anything that I could summarize here, and I am still trying to get my head around it all:
- Improvements in the .NET Framework Setup for Client Applications
- Improved working set and startup improvements for .NET Client Applications
- Windows Presentation Foundation (WPF) Improvements
- WPF Control Improvements (Note that there is mention of a Microsoft built DataGrid, which is sorely needed)
- Visual Studio 2008 WPF Designer Improvements
Again, please read his post at the link provided above for more details.
~Robert Shelton