An LMP1 or a Formula racer is the ideal shape that supercar makers will always try to approach or approximate... though they'll never make the cars that ungodly uncomfortable.
The ultimate expression of this is the T1 Caparo...
Which is, visibly, a terrible design, drag-wise.
More realistically, they'll end up with a design and packaging similar to the McLaren F1, which was probably the last road car to become a successful top-level racing car. Low drag is nice, but the need for cornering stability, suspension travel, wider tires, engine cooling, a low center of gravity and etcetera, are always going to push the cars into similar shapes.