Audi's Grandsphere concept car is a dreamy autonomous luxury EV

Audi's latest idea is an autonomous, electric luxury sedan.

Last month, Audi presented its autonomous concept for an electric convertible called the Skysphere. Its next version of a future car is the Grandsphere, which was unveiled Thursday. A third and final "sphere" concept car will roll out in 2022.

Like the Skysphere,...