I think it`s something users should bare in mind more than anything else.
If you want to jump on the Vista wagon as soon as it comes out, then you`ve gotta accept this as a possible issue for you.
I don`t think complaints of "I`ve only just bought xyz - and now I gotta buy an extension/upgrade/new product" actually cut it.
If on the other hand you bide your time, knowing that you`ve only just bought xyz, and prehaps port to Vista after a certain period - you`d normally expect software companies to release chargable updates, however bogus, after prehaps a year of the last version.
Consumers need to prehaps think more about their overall picture and not jump on the OS as soon as it comes out coz it`s the latest thing to have. Sure if u know u`r softwares gonna work fine with it, then knock u`rself out.