I use linux for most of my needs, but still keep a windows xp install on my main pc solely for video editing. I do everything I need in xp as far as that is concerned, so until my video editor no longer works with xp (and even then I may just not upgrade the vid editor software) xp is fine for me.
With every release of windows the hardware requirements become greater and greater... The os saps more and more of the pc's power away from the user, its kind of ridiculous.
