I saw a notice today from VMWare for a v5 upgrade. http://www.vmware.com/products/fusion/features.html A couple notable feature include retina support, usb 3.0 support, LM notifications and supposedly 40% improved battery life. The only negative I see is cost - $49 - whether you are coming in fresh, from 3.0 or from 4.0. No loyalty reward, I suppose. I am going to try the 30 day demo to confirm the 70 new features and improved performance are really there before shelling out another $49.