[soarer]

As you'll see in this official Lexus RC-F photo, it has what seems to be a carbon fiber roof

 

[phm14]

According to this, CF roof, hood and decklid:
Scoop: The all-new Lexus RC and RC F - Motor Trend
and a price tag of $100K+

 

[phm14]

That $100K price may have been Australian pricing. That might mean closer to $70K US. Well, I can hope until they release "official" pricing soon...