I think there's only one car that could possibly have been today's pic.
1957 Chevrolet Bel Air. The quintessential '57 Chevy. Well, now that I think about it, there might be one other:
1957 Chevy Nomad. Of course, the Nomad is based on the Bel Air, so it's kinda cheating. Either way, though, there's a pair of really nice cars, the likes of which we'll not see again.
I've often wondered if GM were to come out with a retro- Bel Air or Nomad, how well they'd do. The VW Beetle sold like absolute mad and reinvigorated VW's tired line; the new Camaro and Challenger have revived the muscle car with a modern twist; even the silly MINI and Fiat 500 are selling well. There's a hunger for the old styling, but with modern appurtenances and engineering.
Done right, I think they'd sell the hell out of it. Done wrong - like the Ford T-Bird, the Chevy HHR or SSR, or the Plymouth Prowler - and it could be the death knell for retro cars. Chevy's batting 1,000 on proven designs (Camaro) but 0.00 on the new/retro (HHR/SSR). I think if they came out with something on the Impala frame with a vaguely Bel Air appearance they'd sell a ton of 'em.
Time will tell, I guess, but for now I'll look at the pictures and drool...
That is all.