Audi R8 e-tron will offer a new technology called digital rear-view mirror. This technology will replace the extremely effective traditional rear-view mirror. From one perspective, digital rear-view mirror is cleaver; thanks to designers in some vehicles we have nearly no rear view and digital rear-view becomes very useful. On the other hand, many vehicles still have proper design and you can see the behind very clear. I really like these new technologies but, a 7.7 inch AMOLED screen may not be very useful when there are too much sun shine. In traditional mirror, you have the view regardless of sun shine and also auto dimming ones are quite useful at night.
I am definitely sure that, next year Audi will offer digital rear-view mirror on their vehicle range! My price suggestion for this technology; if the screen has less pixel per inch than a iPhone (~330 ppi), it should be priced less than a iPad. So, it should be priced around £300 :)