Both this post and this post mention end of 2019. Is this still the planned timeline?
Well, since we now soon will have an excellent Blender Datasmith plugin the playfield is about to change a little bit, since I believe that the iPhone games market dwarves the pro tools market by quite some orders of magnitude, if you want to do that contest. 
(EDIT: I now see that most people doing iOS games do it on PC and VPN build to a Mac? Boo. 
On the bright side, I managed to open my datasmith project on my Mac without any issue. I guess the only thing is that I’m not able to re-import or import new assets unless I do that on the PC first. Still, one more vote for Mac.)