Although I suspect the BeamNG devs will keep working on offroad stuff/remasters/new features based on the stuff discussed in this thread earlier, I'd LOVE to see a Deusenberg or a Packard style vehicle. The Auriga Heron is the closest we have, and the level of destruction on it is awesome. I also believe someone is working on remastering the 1949 Cadillac convertible, but hasn't received permission to release it. I'd also love even more to see a 30's GP racer with real physics (looking at you Assetto Corsa...) but that seems much less of a possibility. The closest I think we'll get to a 60's endurance racer will be through the Bolide's racing configurations. As for the 70's giant American sedans, I can definitely see that being added in the future, for we received another big icon of the US, the minivan.
NGL, I've been overanalysing this for a little bit, and so far the most interesting bit is one of the bulletpoints starting with the letters "flic", which aren't that common in english. When it comes to cars, the most obvious thing that comes to mind is the Scandinavian Flick, a driving tecnique where you use weight transfer to start a drift. So this must be about tires and suspension physics, right? Well, not really as it's already possible to do a pretty convincing scandinavian flick in the game already. Well, other uses I found were flick switches, as well as flickering of lights. Flick switches are those joystick-looking switches normally found in old cars or in racing cars. As for lights flickering, it's something that doesn't happen with the cars in the game. In my opinion, this doccument is talking about a better simulation of vehicle's electrical systems, such as batteries and lights. The "flic" could mean something like "Flickering of lights when battery short-circuits" like if a car is submerged in water, or "Flick switches able to be controlled by triggers", sort of like how the Stambecco's tire pressure monitoring works. Other "Flic" words I was able to find online were a brand of automotive control boards, a brand of keyless entry systems, and well, the image website Flickr.