Pretty original to me.
We go over this time and time again, and I suppose we need to go over it once more. The Challenger was designed the way it was because of the Charger. When the Charger debuted there was bitching and moaning that it wasn't retro, wasn't a coupe, and didn't "look like a Charger" (although this is the best looking Charger IMO).
To appease these people, who want a retro, 2-door muscle car that "looks like it should" they created this. It's everything the Charger isn't in terms of design, and what people wanted. In addition,
(including people on this very thread)consider it to be excellent looking, carrying the spirit of the Challenger, with odern proportions. It isn't a carbon copy of the original. It's very retro to be sure, but the proportions are very modern, as is the [concept's] interior.
So, for those who want a modern, practical muscle car, we have the Charger, and for those who want a retro, 2-door muscle car, we have teh Charger.
I for one love both the Camaro and Challenger designs, for different reasons. I love Chevrolet's modern take on the car, but I love Dodge's retro take on the Challenger. They took different takes on their icons, and neither one is bad.