Recently VMware released the new version of vSphere. One of the biggest announcements of the release is that in 2011, VMware ESX will go away and be replaced with ESXi.
As part of that transition, VMware is releasing new features to ESXi to make it more appealing both to the current VMware Admins and to new VMware Admins (who may currently be Windows Admins).
Trainsignal made an impresseve overview of the new vSphere 4.1 Features.
Learn more about it at: Trainsignal – New VMware vSphere 4.1 Features