I really don't care anyways.. all the service packs will do is just fix bugs and improve performance.
XP will still be the smarter choice in the end... unless... Microsoft does something really monopilish <------made up word)
and continues to try to make things "Vista Only"
Example: Games for windows, dx10...
So far people have gotten every "Vista Only" game to work on xp perfectly fine (and they said it was impossible)
and dx10 on XP is just a matter of time.
Its Microsoft vs. the world of haxers and crackers, and Microsoft will always lose.