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Behold The Hyundai Uni Wheel. Transportation May Never Be The Same
(cleantechnica.com)
This is a most excellent place for technology news and articles.
If it was just a solid axle going from the motor to the uniwheel you couldn't steer the car. It doesn't allow for such movement.
Looks like it eliminates the engine-side cvd but not the wheel-side.
Can't really do that, u-joints and cv's work in pairs to balance the angular change
There is no angular change between the axle shaft and the engine.
The motor could turn with the wheel. You could have a wheel-motor without the excessive unsprung weight of the motor components.