In response to my post yesterday, Ed fires back with some good points about user model, window management, and familiarity...

"While there are tons of sexy features coming in Avalon, my money is on navigation as the single most important feature. Sure, the MIL, simple 3D, styling, declarative design, great tools, interop, etc, are all cool, but navigation is what Windows client programming is most sorely missing today and will benefit most from in Avalon." [Ed Kaim]