I think about that since long time ago.
F1 is always F1 if they close the car ?
today, i see they think about this solution:
or
for 2017 or 2018...
http://www.motorsport.com/f1/news/f1-co ... gn-672256/
IMO, it's really important to keep an open cockpit, it's like that since 60 years, it's the heart of F1...