Common sense to prevail it seems :)
On Oct. 16, Microsoft issued the new user license for Vista, including terms that would have limited the ability of those who buy a boxed copy of the operating system to transfer that license. Under the proposed terms, users could have made such a switch only one time.
However, the new restriction prompted an outcry among hardware enthusiasts and others. Microsoft is returning the licensing terms to basically what they were in Windows XP--users can transfer their license to a new PC an unlimited number of times, provided they uninstall and stop using it on the prior machine.
Source: CNET News.com