Update for ya Cap'n :
So 1.0 full release, build 53148. I had some VMs running, and quit them. Fusion is still running, and I did not quit that between.
Top does not show any vmnet processes run. Only one related process, vmware, and that is for Fusion itself. Full screen, unity, single window back and forth, when the vm itself is active and running, there is vmware-vmx process, when it's run in Unity, there is also -doc process, but when switched away from Unity that quits, and when the vm is suspended (or shut down) vmware-vmx precesses quit. And when Fusion quits, then even the last process quits.
I guess I didn't just notice it earlier as I kept home the previous build until recently.