I was pumped to get the Fusion beta in, and back towards the Workstation features I missed with Parallels.
Hopefully they'll arrive before the product goes GA.
As others have mentioned, I make extensive use of the snapshot manager. Doing development of labs for IT classes, multiple snapshots and branches are key to being able to build a new class and allow students to recover to known point if they have gotten off track with their labs.
In my development environments I also make significant use of host only networks and teams for building demos and solution test environments.
This is a great start, and I'm psyched to see what's to come.