It's nice to see a free update, but I don't think that affects the 'debate' much. It still very much depends on usage.
As I said, I have licenses for both anyway, but if I were just using them for dev work and wanted something to just run vagrant with (as opposed to building vagrant base boxes), Parallels is still generally cheaper, and you have a supported single-vendor solution.
Parallels provide vagrant support directly for Pro/Business licences, and provide a first-party vagrant plugin to enable it.
VMWare don't offer vagrant support, you instead have to buy a license for the VMware vagrant plugin from HashiCorp (who develop vagrant) on top of your Fusion licence.
