InfoPath and XAML
The scales fell off my eyes this morning when I was answering an email to my recent SD Times article discussing InfoPath. I wrote that column before the PDC and hadn't really thought about it since (it's mostly a criticism of InfoPath's licensing model). But now I see the obvious: if InfoPath 2006 (or whatever) generated XAML, the result would be the exact "stepping stone" between power user and programmer whose absence I lamented in the article.