Thank you for the reference. After reading it I get the impression that the connection between the Tesla presentation and a technology that could be applied in real life is not close, to say it mildly. Do I understand?
The actual concept is to reduce the pressure under the car to create downforce along the underside of the car (often ducted and pass through a rear diffuser for more efficiency.
The purpose of this is cornering speed. Rubber wheels have limited grip to translate lateral forces and avoid skidding or understeer, so downforce is used to provide a momentary vertical load to keep the wheel pressed into the ground to avoid slip.
We can easily generate downforce to go around corners, but it comes at a cost of adding drag, so straightline high speed is reduced. and the car is less efficient.
underside aero does not incur nearly as much drag penalty so is attactive on F1 and other race cars.