why would a road car need this? skirts especially are ridiculous for a road car.
Also, why not just mount the floor unsprung? then the only flex is from the tyre, which is significant, but not easily removed in any case. The only reason for active suspension back in the 90's was bceause they were not allowed much unsrpung downforce, and active suspension let it operate at the ideal orientation.
It is fully within the realm of possibility to have the floor and both wings as one single piece, the only remaining challenge would be to mount it to the uprights. No need for finicky electronics and sensors.
My point was more like isn't self leveling and height control already a staple of active suspension? Is decoupling the suspension and underbody even worth anything on top of that?
the point of that self levelling/height control is to decouple the suspension in the sense that it virtually eliminates changes in pitch, ride height and roll. It doesn't make sense to use a suspension system to decouple something from the supension.