It will take a while to trickle down.
It's just not cost effective to start with a rare and unusual vehicle combination.
I would say it will probably start with 5th wheels as they already have semi's on the road. There simply is a lot less concern with sway and jack-knifing compared to bumper pulls.
But long term even bumper pulls will go that way. For a while, it will be your choice but like seat belts, air bags, anti-lock brake an other features...once the old guys age out of the system and the insurance companies compile enough info, it will become standard.