The Revopower wheel isn't anything new. One of the earliest motorcycles used an in wheel design. In 1892!
1892/3 Felix Millet
However the most similar design to the Revopower wheel is probably the one that Singer produced as early as 1900. It too was marketed as a replacement wheel for a bicycle.
1900 Singer Wheel
1904 Singer Wheel
Singer originally obtained the design from Perks and Birch
and the look of it is suprising similar to the Revopower version.
Perks and Birch
Singer wasn't the only company to produce an in wheel design.
Megola also did something like this:
Yet another version was manufactured by Cyclemaster
Cyclemaster Motor Wheel
More on the Cyclemaster
B.S.A Winged Wheel
B.S.A. Winged Wheel photo
As you can see this design is neither new nor is it unfunctional.