I like the overall design in the Ferrari concept. Seems to deal with some of the issues F1 has been having with tire protection and cars launching after wheel to wheel contact.
Also could open up a can of worms for aero design and rules interpretation. More surface area to tweak and massage for better aero grip. If this design is implemented without any form of template or standardization, I see the teams with good aero programs leaving the rest behind.
Would like to see Indy car adopt the Ferrari rear wheel area design instead of the bulbous design they have now. Maybe graft the front wing a little better also.
Just for reference, the current Indy car design.