I like Seth Godin's take on the ads:
"[...] Vista and PowerPoint and Microsoft's other core non-game products are largely devoid of personality and are optimized to be sold to organizations that prefer it that way. Microsoft can change this if they want to, but until they do, running ads pretending to be something other than that is a waste of money."
http://sethgodin.typepad.com/seths_blog/2008/09/what-adverti...