@Craig_Matthews:

Dick move or not, license terms that tie a software license to a specific computer are totally legit.

In the USA at least, the first sale doctrine doesn't apply to [most] software (there are some exceptions related to console video games). In other words, in the special case of software, copyright holders retain full distribution/transfer rights over software even after they sold the license to you. This has interesting implications, like they can even restrict you from reselling it even entirely unused (or require you be an "authorized reseller").

This is NOT the case for other copyrighted works like movies or books where copyright holders lose the distribution right after the first sale. Although copyright holders MAY be able regain distribution rights after the first sale if and only if the works in question cross a national border, but that's to be decided by the Supreme Court soon.