JayZ vs. Nas; VMware vs. Parallels. VMware answers Parallels Coherence with Unity. Mac virtualization gets competitive (No they didn't. No they did not just use C&C Music Factory in this video. They did. )
Aside from the ridic soundtrack, this video is compelling.
Yes, VMware Fusion is already available for free (in Beta). But this video shows features not currently available in the beta that you can download right now. Most notable is that VMware Fusion has responded to and one-upped Parallels Desktop's ability to have each Windows application be its own little window in OS X, rather than have one "parent" window host all guest applications.
Parallels calls this "coherence." VMware Fusion calls this "unity." They're pretty much the same, except that VMware Fusion can have each window appear individually in OS X's Expose feature, something Parallels does not.
That said, Parallels is fully released, and VMware Fusion is not. And the unity feature doesn't exist in the beta that's out. Add to that the fact that VMware hasn't announced how much/ if it will charge for VMware Fusion (its features are positioned between the free VMware Player, and $189 VMware Workstation).