As you probably know by now, one of my pet peeve is people who pretend to know more than they actually do, and (because they get access to the right channels) spread misinformation.
<rant>The term is “File and Registry virtualization” (go look them up on the Microsoft site). The connection with UAC that they get activated the same time, but then again, by the same logic, why not call it Vista virtualization and create even more confusion? You are doing all a disservice by using non-standard lingo which is not easy to look up! There are only two possible reasons to do this: ignorance, in which case you should be stripped of titles like “MVP” or malicious intent (ie. bringing more traffic to your site by ensuring that only you use these names), where a small thing called “ethics” comes in.</rant>
Then again, maybe I should be glad that the level of knowledge about MS is evaporating, because maybe more people will move to Linux :-).