I went to an OpenSolaris users group last year. They were talking about new network features like being able to assign sub-interfaces to different zones. Stuff

I went to an OpenSolaris users group last year. They were talking about new network features like being able to assign sub-interfaces to different zones. Stuff that VMware ESX had available for years. Zones and ESX are very different beasts, and de-duplication of memory is only part of the issue when you're talking about virtualization of user-space versus hardware virtualization.