This would actually be great! I guess the core challenge to achieving this would be in designing a metamaterial that meets the structural demands (strength-to-weight ratio) of a car body while also performing the complex wave manipulation required for invisibility. I wonder how far we are from reconciling those two very different requirements. Perhaps with the use of AI for metamaterials design we could be closer than we think!

They were talking about a cloak. So conceivably you just keep the existing materials and wrap this around it.