An airbag-free, and also side mirror-free (and also wiper-free?), car would prove difficult to be legal... Law has to be changed. Besides, I don't know what's the logical thinking behind trying to get rid of an essential feature in a 250+ mph top speed car with 1,4+ g of peak acceleration. Maybe a bet on a 10x safer AP software in 2020?
Also when cornering (especially, again, at high speeds) it doesn't feel quite right to have only two tiny handles to control the car... (a video shows Franz von Holzhausen taking a turn and indeed it doesn't look practical) Was that kind of steering 'wheel' already used in production car?