My neighbor (who works QA there)
tells me the compelling reason to get it is improved security. Like IE runs in a sandbox where it can't access system resources now. But that's pretty much it.
[link|http://www.blackbagops.net|Black Bag Operations Log]
[link|http://www.objectiveclips.com|Artificial Intelligence]
[link|http://www.badpage.info/seaside/html|Scrutinizer]