Perhaps you've heard that Windows Vista is capable of virtualization.  Great!  So what does it do, or better, how does it compare to other virtualization solutions?  Specifically, how does it compare to Altiris SVS, the application virtualization solution designed to help you operate your applications without the fear of conflicts.  Scott Jones, Product Manager at Altiris (now Symantec) on the SVS product, writes on Juice "that the difference is that with the Vista feature you reference, all legacy apps write to the same "virtual" space". 

He continues by saying, "So the technology is fundamentally different, as well as the purpose. All the Vista feature is concerned with is legacy app compatibility. While SVS can get you that (without the conflicts and the security compromise), the main purpose of SVS is virtualizing an entire app -- any app -- as a discrete unit that can be rapidly and reliably moved around. In a nutshell, app virtualization is all about 'faster, more reliable availability and removal of apps; conflict elimination; and state maintenance'."

Read more of what Scott has to say, here.