So are we gonna get a full feature list? I can't really make an informed decision when I know nothing about the engine/framework but what I've seen in the video.
Is it actually an engine or is it "just" an advanced framework? Are there for instance game objects which are handled by the engine? How easy is it to extend it with new functionality?

However I can say that it has to be really really really good if I have to cough up with the money. And I would actually want to play around with the engine before paying for it. Maybe do a license where you only pay for the right to do commercial projects though it may be a hazzle to handle if it's only you doing the work.