This video has been on youtube for a while. There is so much great stuff, it is hard to know where to start. GM still has the Firebird I/II/III concept cars. Jay Leno has been allowed to test drive them - also with videos on youtube.
One can imagine that whoever came up with GMs OnStar system had to have been inspired by the film. Also Buick made a lot of "turbine" wheels and caps over the years that look like they came off the Firebird concept cars. Over at Chrysler, it seems like Virgil Exner was taken with a lot of the exterior design elements of the cars as well. (Look at the side views of the horribly styled '61 Valiant and Lancer...)