For Windows 7 to be declared a full success it will need to tempt Windows XP users to its fold - and while users of it’s last attempt at an Apple-competing OS, Vista, are migrating rapidly to Win 7, there’s no such movement among XP users.We’ve seen the hype - strong initial sales, decent reviews and the confirmation the new OS was inspired by Mac OS X’s look-and-feel (which the company later denied, but not especially convincingly)But information Windows 7 is “quickly displacing Vista - but not XP” has got to be disturbing for Redmond. InfoWorld’s Windows Pulse service reports: “As Windows 7 picks up user share, it seems to be making most of its gains at the expense of