This is exciting news!
I have been away from professional use of formZ for four(!)years, but have continued to use version 6.7.3 on an aspect of a personal project that has been consuming all my time. I expect to return to professional use in less than a year, and of course I will then update to the latest version.
During my time away I've been checking the formZ forum virtually every day, mostly in the hope of seeing some good news about rendering options. While there have been a few teasers along the way that have all vaporized, this news about Thea Render actually seems like it will result in something tangible that I will want to use.