I upgraded three things at once - OSX Lion, VMWare Fusion 4, and Ubuntu 12.04 - and one or more of those things enabled the fancy graphics, windows fade in and

I upgraded three things at once - OSX Lion, VMWare Fusion 4, and Ubuntu 12.04 - and one or more of those things enabled the fancy graphics, windows fade in and out, the nicer task switcher, all that when you enable 3d graphics in the VM.