I know that the current favored UI development API is Win RT (or Modern Applications ...) and that WPF (and Silverlight) are "out of favor". But I was a bit surprised to note "WPF" is not an option in the search tags for the Build Conference.
Now I don't follow conferences that close, but I know some are themed (ie "Web"). Is Build a "Web" conference?
How do you go from talking about Win RT to assuming Build is a "Web" conference? Build is about developing using Microsoft technologies. That includes desktop. However, there's not anything new in WPF, and with all of the new stuff released elsewhere, there's just no reason to focus on it now. That doesn't mean it's "dead", though.