Nah, they won't look like that. I saw in an automotive magazine yesterday some ideas by top race car designers what their ideas of a future race might look like. Even though some of the designs were a little "out there", at least they looked like race cars. The most radical was a design that had from six to twelve wheels/tires. Can't remember who the designer was, but he said that his design would allow the cars to corner at the same speeds as straightaway speeds.
Nice red XI actually met a guy who could build that today. He built this
I wouldn't want to try and ride it in traffic, but it sure looks cool.