And then there's the Mercedes-Benz F 015 Luxury in Motion.

Catchy name aside, this odd-looking creation has had such a varied life that its maker refuses to call it a "concept." It's a research project instead, hence the name (the 'F' is a German prefix denoting 'research vehicle' status).

The F 015 made its debut at the Consumer Electronics Show in Las Vegas more than two years ago. It's packed with advanced (or what was considered advanced in 2015) autonomous technology, and can, in theory, run for almost 900 kilometers on a mixture of pure electric power and a hydrogen fuel cell.

But while countless other vehicles are still trying to prove that cars can, literally, drive themselves, Merc's offering takes this for granted. Instead, this vehicle wants us to consider what we'll actually do while the car is driving us around.