That would be completely stupid
do they imagine in their sick little minds for just one second that someone like Amazon would drop html and switch to a windows only technology? (Actually, I've spoken to several of them and - yes, they do imagine this).
Avalon is a UI serialization scheme - rather like xul, but not portable. No way they'll pull the web into that world. They are losing ground (marketshare) daily, this would be one more push.
"Whenever you find you are on the side of the majority, it is time to pause and reflect" --Mark Twain
"The significant problems we face cannot be solved at the same level of thinking we were at when we created them." --Albert Einstein
"This is still a dangerous world. It's a world of madmen and uncertainty and potential mental losses." --George W. Bush
