You may not see 'over-the-top' as real cars because they aren't conventional designs. However, with greater scope for innovation nowadays, there are more opportunities for car manufacturers to think outside of the box and come up with new ways to design cars. Lets use the DeltaWing as an example. Aesthetically, it's arguably unattractive, but its shape does have benefits in terms of weight, handling and efficiency, and these discoveries are finding their way into (future) road cars. Sooner or later we will start accepting this sort of design to be normal.