There have been a number of reports on the internet about all sorts of terrible things you agree to when accepting the Vista EULA, but it isn’t really that bad. There are however a couple of things that you might want to know. It’s true that Vista Home and Home Premium can not be installed in virtual machines. Microsoft claims that the majority of users wanting to run Vista under virtualization software are businesses and enthusiast who would be better served by the Business and Ultimate versions respectively.
The article goes on to explain that nobody who buys Vista actually "owns" it. Instead, it’s licensed to the user. That’s quite something. Handing over $200 – $400 for brand new software and you still technically do not "own" it.
Source: Wired