http://www.vmware.com/products/fusion/overview.html
With more than 90 new features and now optimized for today’s multi-core Macs and OS X Lion, key features in VMware Fusion 4 include:
- Built for OS X Lion – VMware Fusion 4 is designed to provide the best Windows experience on OS X Lion. Add Windows programs to Launchpad, experience them in Mission Control, view them in full screen or switch between them using Mac gestures.
- Better Performance and Faster Graphics – VMware Fusion 4 has been engineered to run Windows and Mac applications side-by-side with incredible speed and reliability. As a 64-bit Cocoa application, it is optimized for today’s multi-core Macs and delivers 3D graphics up to 2.5-times faster than previous versions of Fusion.
- Even More "Mac-like" Experience – VMware Fusion 4 enhances the way Windows programs run on a Mac. From the brand new settings menu to the redesigned virtual machine library and snapshot menu, users have even more Mac-like experiences when running Windows programs.
- Lion Squared – VMware Fusion 4 now supports OS X Lion in a virtual machine, allowing users to get more from their Mac by running OS X Lion, OS X Lion Server, Mac OS X Snow Leopard Server and Mac OS X Leopard Server in virtual machines.
Currently $49.99
Looks nice. Probably will upgrade if only for the extra GFX performance alone.