Nothing in the car industry was EVER revolutionary. Cars have naturally progressed from earlier related technologies.

In fact I would claim most technologies are like that. Hence to call something revolutionary, it makes most sense to talk about who has made a radical improvement.

It is kind of like how there were smart phones before iPhone, but iPhone was such a radical improvement that it represented a revolution.

In much the same manner, the Model S was a revolution, similar to iPhone. It pushed electric cars significantly forward and set the bar for what an electric car could be.