B.Gates needs to fight common wisdom.
In Brazil, common people know nothing about Vista. In the web forums, they laugh at you if you confess that you bought a Vista license.
Few people can afford to buy a brand computer. Almost everybody have their computer assembled by a knowledgeable person, who installs a "legitimized" copy of Windows XP.
A few knowledgeable persons have installed Windows XP on a virtual machine under Ubuntu GNU/Linux and are living an unconcerned life now. An accountant I know has been trying to run the accounting server application under Wine because Windows XP on virtual machine runs too slow, but gave up yesterday. He is going to add memory to the server and run VMWare on it under Ubuntu 7.04 (Feisty Fawn). The 6 clients are still using the client part of the accounting application under Windows, but it seems that it can work through a web browser, then that requirement will disappear.
It seems that this accounting office will be able to stretch the usable life of its equipment with the addition of 512 MB of RAM and a new $300 Samsung laser printer!
As you can see, nobody here is even thinking about Windows Vista! That is common wisdom in my perception.