First of all, do you know how much an automatic transmission costs? Do you know how complicated it is compared to a toroidal CVT?
Second, that is not the final version but only a scale model. I am pretty sure that the transmission can be downsized to fit into an actual vehicle and save on materials.
Third, even if you make those disks out of tool steel, which is very expensive steel (chrome vanadium), it will still be relatively inexpensive due to its simplicity.
In my opinion, automatic transmissions need to GTFO already. They are inefficient, heavy, cumbersome, create a lot heat, and need to be serviced way too much. The newer 8 speed transmissions just add fuel to the fire in terms of their disadvantages. Yes they work but that doesn't mean they are effective. I guess for what they are, they're not too bad and have got much better over the years but that doesn't mean we should stop looking for better alternatives.