@deiruch: Most companies upgrade system with hardware. With OEM suppliers banned from providing new OEM WinXP systems, the market share is expect to shrink within 3-5 years. (I heard many companies bought downgradable models on the last wave, so make it this long)
Btw, lots of hardware vendors have stopped to provide WinXP drivers. Companies will have to move on... WinXP is not like Win9X which you could more or less make it work with only generic drivers.