Jason Zander, General Manager for Visual Studio, revealed on his blog a few changes for Visual Studio 2010. The first is that the entire IDE has been rewritten using WPF (which will probably make it the first large application based on this framework... but something expected as it needs to embed the related WPF designers).

The second change is the availability of "floating documents", which is a departure from the embedded designers that also recent versions of Delphi have borrowed from Visual Studio, with the main reasons of supporting developers having multiple monitors. With the decision to remove "floating designers" from Delphi looming for years... this might imply a reversign of the decision. 

As my friend Luigi pointed out on our Delphi And Dintorni newsgroup, had Delphi kept pushing floating designers it could have claimed to be ahead of Visual Studio. But at least they are still in the product...