Windows for Free: Has Microsoft Gone Crazy?
"In such a scenario, Microsoft is investing money in software development, and even though the final product is great (and I use that term loosely) by itself, it is not so significant a change that people will upgrade immediately. I expect a lot of people to stick with their current office suite even when Office 12 becomes a retail reality; same could be the case with Windows Vista. Having said that, it's also a given that there is no way software development can come to a halt. What option does that leave the software industry with?"
