Which makes sense and was what I figured your rational was.
Being a .NET guy since early alpha days, I have to say the transition is going to really depend on the devs. If they were pure asp.net guys, I would say good luck. Since they are WPF and SL people, the mountain will still seem steep, but I believe their skill sets make it a bit easier to get up it.
What I am telling all my guys is to start digging into HTML5 and CSS3 now. Don't wait for the "standard" to be finalized, it will be some time. Try to point them to things that can help them make use of the HTML 5 features they want but will allow them to gracefully handle older browsers. For me, that was Web Sockets. So I've pointed them to Signalr and Pusher.
Hope this helps.