I wonder if their definition of "Cd 0.1 level" really just means anything in the 0.1-0.199 range...which would be a bit less shocking.
On a possibly related note, I was tangentially connected to some research work many years ago that involved using thin electrodes and generating plasma to delay boundary layer separation, keeping air flow more connected on the downstream side of bodies with a spherical or rod shape. This effectively reduced the wake behind the objects, reducing drag.
I don't recall the details from that work, but doing some quick googling, I did find this article:
A quick skim says 6-9% drag reduction when applying electrodes to the top surface of a scaled model of a semi truck trailer.
I could imagine more drag reduction if electrodes were placed on the sides of the trailer as well...perhaps 20-30% total reduction.
I'm not sure if the drag savings would be bigger or smaller on a more aerodynamic shaped car...I can make hand-waving arguments either way.
Power usage seemed to be about 100 watts per meter of electrodes...not sure if that would have to scale up to reduce drag on a full size vehicle instead of a model. But, *IF* that figure holds, and you could surround the back end of a square-ish SUV with 4 meters of electrodes, and activate at highway speeds, the power consumption might be 400 watts...so the consumption would only be 400 watt hours during a 1-hour drive for a "cost" of about one mile of range per hour. But if the drag savings were 10-20%, you might "save" 5, 10, 15 or more miles of range during that hour at highway speeds, so you could come out ahead.
This doesn't break any laws of conservation of energy...you're just effectively using electronics to alter the apparent shape of the vehicle in a way. Like adding those flaps they put on the back of some big rig trailers to reduce drag...those use zero power but save energy for the truck.
This is all somewhat-informed speculation and estimation on my part...I'm an engineer, but this isn't my field. Just interesting to think about.
That almost looks like a museum display...wish I could read what look like little signs above each object. But, I think the left is a "standard" multi-part stamped underbody, and the right is the casting. Still looks a few steps behind Tesla's, though, as you mentioned.