The webpage also said retail licenses will be discontinued at that time, which means Professional edition, Tablet PC, Professional x64, Home edition, and Media Center editions of XP will not be available next year.
According to news reports, a company spokesperson called it standard practice to allow OEMs, retailers and system builders to continue offering the previous version of Windows for a certain time after a new version had been released.
Microsoft has also confirmed that from 31 January 2008, large PC makers, such as Dell, HP and Toshiba, will no longer be able to buy licenses for the software so they can install it on new machines.
Meanwhile, Windows Vista has not been received too well in the US and Europe.
A poll by US market research firm Harris Interactive found that only 10% of those questioned were planning to upgrade to Vista in the near future. The study of 2,223 web-using Americans found that although 87% had heard of the operating system only 12% of those who knew of it were planning to install it. While the survey did find that some people waited for Vista before buying a PC, 60% said its appearance had no effect on their spending plans.
It also found that currently, 79% of those questioned were using Windows XP on their home PC.
If they discontinue xp then I stop purchasing new systems that use windows and go to mac , it's that simple . 
