So I know what he is trying to say but he is a fucking moron so he has clearly mixed up several Industry 4.0 terms.

So a 'digital twin' is a simulation that runs and makes predictions off of real sensor inputs. Pretty useful stuff, and a rapidly developing field for those that have the money and manpower to implement these SCADA systems. Most modern electrical turbines use this stuff for preventative maintenance, though people are trying to incorporate AI into it for problem solving (for some reason).

We already "build digital cars" as in we make models of the products digitally prior to production.

Idk, his brain is just kinda fried.