Having just spent two months on a the tail end of a six month car launch project, anything that makes it easier is welcome!
But what the Blackbird does is greatly improve the on-set process and animation, its a terrific idea done very well.
The actual nuts and bolds of creating a version of the car for the advert itself remains hard work for the CG guys. They get the CAD data from the manufacturer and then have to convert it for a totally different purpose.
That's a less sexy part of things but it could use an overhaul too, from what I've seen. It's mostly a manual process not an automatic one.