A Toy. Have I mentioned that I love modular toys.
Let the images talk for themselves. If you still insist on an explanation, shall be so. The idea is simple and taken from the car industry. Often car makers use the "same" platform for different vehicles in their line. They do so to save some of the development costs of course. So my vision is that one chassis will fit several cars and trucks. In my mind it is straightforward, the chassis will accommodate the drive -train, electric or not it's up to the industry to decide. The wheels are interchangeable so you can swap them from race wheels to heavy-duty reinforced ones. The cars of the future will have a "cabin" and a drive-train as basic. Everything else will be obsolete.