Will Sun bring an end to the reign of Microsoft?

This article discusses how the interest in Sun's Star Office and Java Desktop System have exceeded expectations. Can Sun actually defeat Microsoft in the Operating System and Desktop Software areas. I know that I would choose it based on the price alone. "The Java Desktop System costs $100 per employee per year or $50 per employee per year if the client also buys the Java Enterprise System server software, which costs $100 per employee per year. These prices are significantly below those charged by Microsoft for similar products."