We can appreciate a good track car as much as the next enthusiast, but we're beginning to bemoan their creation as a way out for automakers to charge wealthy customers obscene amounts of money for cars they're not even legally allowed to drive on the road. (As least, not in countries were homologation can't be circumvented with a sufficient bribe to the right bureaucrat. Which we're not entirely sure includes these United States.). It's the road that Lamborghini is expected to take with the "production" version of the Sesto Elemento concept, and it appears to be the way Jaguar plans to bring its C-X75 concept to production.
Autoblog, Jaguar to confine turbine-powered C-X75 to track use?