Symmetrical hubcaps are symmetrical because they aren't spinners.
I would think there is potential gain from not having the hubcaps spin with the tires even if symmetrical. Whether worth the trouble/expense maybe not.
It does open up some possibilities that might not have been thought of,
if nothing else might have some interesting asthetics.
The wheels are covered by the body in the Indy One.
It is the gap that I'm thinking about. There can be more than one wheel tire size, so the gap can't be made real tight.