People...if I remember correctly MicroSoft took the best of XP and the best of Vista and got rid of all the bad things of both and created Windows 7. So you get the best of both worlds. 
And I love Win7 over Vista any day. 

Shame on me...I used to think Win7 was actually rubbish (British speaking person here

). Dunno why, I just felt it.
But I guess the more I use it somewhere, then the more interesting it seems.
^^
Windows XP is actually more present in places like work, schools, and library computers, since it's cheaper than Vista or Win7, but it's still very popular.