According to this, the next version of Visual Studio (v2008 + 1), will have an editor written using WPF.
VS10: new WPF-based text editor w/ fine-grained extensibility, Microsoft Extensibility Framework (MEF, a.k.a. COM for managed code), new features support multiple languages
A very common scenario where I work is to use Remote Desktop for code editing, so if the code editor and shell is WPF — I’m very worried about the desktop remoting scenarios.
What’s your thoughts? Do you want your development tool to be the real first “giant” application produced by Microsoft using WPF? It certainly makes sense for many areas (like visualizations) – but ….

WPF was designed with Remote Desktop in mind. If I understand correctly, it is capable of remoting only the visual tree and taking advantage of the client’s CPU/GPU.
I would also note that the only other “real” or “giant” WPF application from Microsoft is Blend, essentially a dev tool.