Absolutely no-one mentioned the Audi concept from 2004 that had the same feature? You saw it in iRobot. https://en.wikipedia.org/wiki/Audi_RSQ#:~:text=The%20c

Absolutely no-one mentioned the Audi concept from 2004 that had the same feature? You saw it in iRobot. https://en.wikipedia.org/wiki/Audi_RSQ#:~:text=The%20car%20uses%20spheres%20instead%20of%20conventional%20wheels https://en.wikipedia.org/wiki/Audi_RSQ#:~:text=The%20car%20u....