I suppose if they use that screen design that Ferrari are using, they'll have to cut down on all the aero guff. When climbing out, if Vettel's foot slipped... Ouch.......

Imagine if they had the full 2008 aero packages and something like that screen. Driver would need to be winched into the car.
So all they need to work out now is, reflections, material strength, mounting, driver access, medical access, keeping it clean, water dispersal, impact resistance....
Wasn't it meant to in use in 2018? They haven't even got a finalised version yet. *sigh*
Really, if it's going to be implemented, then it needs to be a FIA spec part tbh. 1 manufacturer and all teams have the same component.