A lot of companies nowadays are trying to move all their clients from the old windows XP platform to either Windows 7 or Windows 8. By April 8, 2014 there will be no more support for Microsoft Windows XP, this includes windows updates, security updates, fixes and normal support. Although XP was a great product, Its highly recommended to move to a newer and more supported OS as Windows 7 or Windows 8.1. Its not recommended to run a 10 years old OS nowadays with all this new security challenges.
Client migration is real problem but also the Server migration is still a big issue. I was curious to know the status of the Windows 2003 Server OS that was released at the same time frame of Windows XP and the good news is that its end of support is July 2015. This is a good opportunity for organizations to plan the move of the 2003 servers, i still see Domain Controllers, Exchange, File and application servers still on 2003 or 2003 R2.
There might be a chance that some security or fixes released for 2003 servers might work for XP (Basically 2003 is the XP server version) However no one should take the risk and start phasing out XP and planning for 2003 phase out before July. 2015.
Microsoft Support Life Cycle Index: