Cool. I have done WPF for a while and it just feels very stale. Nothing new coming, MS changing direction very 2 years. I would put everything possible on the web now. It's a much more interesting environment. And if you really need desktop for some reason, I would probably go Qt/C++ now. Or straight Win32.
My product depends on WIX, which in turn depends on .NET, so there was no reason not to go with .NET (I started with WinForms but then converted to WPF). Web can be interesting but I just have a harder time coming up with ideas for products than I do with desktop.
