What features are people looking forward to in .Net 4.0 - 4.1

Question

I am very interested in learning what features people are interested in in the forthcoming .net framework(s)?

Whether these be new classes or new controls I am curio

Answer 1

I'm looking forward to new WPF controls. I believe the now WPF Toolkit will be incorporated as controls in the framework. It'll be a lot nicer having them as stock controls in Visual Studio and having them patched with the .NET framework rather than having to download a new set every time bugfixes have to go out.

Also, i'm looking forward to Visual Studio 2010 in all it's WPF glory!