Applying Sci-fi

Hubless wheels, or a wheel without a center are often something seen in science fiction and  future concept vehicles.

  

While they look great, there are a number of issues in practicality and even just getting a prototype to function.  However, the hubless wheel design is not entirely in vain. In fact, it has even won design awards.

Rosle-PizzaWheel-0.jpg 

When used as a pizza cutter the hubless wheel is beautiful, functional and totally unique. What else can be designed, by taking sci-fi concepts, and finding a practical application?

http://s3files.core77.com/blog/images/2012/10/Rosle-PizzaWheel-2.jpg 

 Found via Core77. Motorcycle image from BusinessWeek.