Thatās true. But they could get some work done, right? Like Mater for example, he could get a new paint job and other changes made to his body structure possibly. Or perhaps they could just show it off in other ways, like big houses and whatnot. 
Oh, of course they could have possessions.
But look at the lemons. Some of them were wealthy. But they couldnāt change the fact that they were lemons.
Lets cry about them now 
Itās just weird to think of because it seems like something the cars are born into, which is such an old century way of thinking- to be born into class and wealth.
I know! But there are people in our society that donāt always appear to be rich either, when really they are. Then there are those who live a rich life just because their parents were wealthy and so on. So if you think about it, it isnāt such a foreign concept. It would be rather unfortunate to be born a lemon though. 
True, but like SoA said, people can change. It would be, actually. Like Holley said, theyāre āhistoryās biggest loser carsā. 
This random thought came in my head: Imagine high gas prices, like we have, but in the Cars world. 
Thatās like high food prices
Oh my gosh! Thatād be awful! 
Hahaha! True say!
I always wondered what dinosaurs in the car world would be like. Iāve been thinking of this since I rewatched Cars 2 yesterday.
They look normal on the Dinoco logo.
It feels pretty odd thoughā¦ I mean, seeing dinosaurs in a Car world would feel weird.
Evidence for the āmachines turned sentient and took over the worldā hypothesis. 
What doesnāt convince me about that theory is that not only the living beings of the universe are all machines (which is explained by the theory), but the actual geography of the world, not to say the architecture, is different.
I think they live in a different universe all together, not in ours and then they became sentient.
Terraforming? Artistic license in car-made pictures of planet Earth, perhaps?
You have a good point. Neither of the explanations I thought up are very convincing.
I seem to recall that the birds from the Pixar short made an appearance in the first movie, which implies that either
A) The machines did take over the world
B) Or that Pixar just really likes easter eggs.
I think it was made just thinking in the Easter egg aspect of the think, after all they only appear in a blur and are impossible to identify except for their squeak.
But maybe thereās a possibility that there are a few organic life forms in their universe. I thin the presence of plants proves this as probable.
I have informations to say on the dinosaurs story: 
There is a nice interview of John Lasseter in which he discuses (among others) the mythology of the Cars world, and he talks of dinosaurs in itā¦
Question: In Cars 2, you mention the existence of dinosaurs. Are those dinosaurs flesh and blood or are they cars?
Answer: āI mean, in the mythology of the Cars world, the living creatures are vehicles of some kind, and so itās like with dinosaurs. I always imagined it would be some kind of dinosaur-like car or vehicle, something like that. It would actually be an animal.ā
Ok, that makes senseā¦ but where did the dinosaur of Dinocoās logo come from ?..
An abandoned Cars Toon concept, called āBackwards to the Forwardsā, in which Mater gets to time travel, Back To The Future-style, and that is presented in the Blu-ray/DVD release of Cars Toon: Materās Tall Tales, also proposed to deal with dinosaurs: Mater ends up in prehistorical ages where he encountersā¦ a flesh and blood dinosaurā¦ āBecause Dinoco had to be named after somethingā says the guy presenting the thingā¦
None of these ideas has ended in a final product in the franchiseā¦ But between an unmade Cars Toons and the director of Cars and Cars 2, I think the second would have the last wordā¦ And that the Backwards to the Future tale shows an abandoned concept.
You were talking of the theory of cars taking over the world, and on how it may be evidenced by evidence of organic life. I would say this on that subject:
I tend to think that that theory is improbableā¦ There isnāt any clear evidence that there has been humans once. In Cars 2, all buildings, sculptures, paintings, from any era, depict cars and/or integrate cars elements in their design. So if cars took over the world, either that happened really early in the History, or they managed to destroy each and every single representation of a human and rebuild it with carsā¦
I would think there is no problem with the theory saying that the Cars world is simply a world exactly like ours, except with animals and people replaced by vehicles of some kind.
Except of course that the numerous references to organic animal life arenāt logicalā¦
From where does the T-rex from Dinocoās logo comes ? The horse of Ferrariās ? The wings and feathers of the allegoric cars on the statues of all buildings and paintings (Thereās even a huge feather on Materās āMaterhosenā disguiseā¦)? And so onā¦
May be those are mythological figures (like dragons in our mythology) ?
Hmm. Having all the normal Earth animals be imaginary does make sense. We have pegasus, dragon, and mermaid art everywhere in real life, so why couldnāt the cars have myths too?
I approve of your idea, Gray Catbird.
I once thought that was possible, but we have evidence that theyāre more than mythological, as that feather, or the fact that organic animals created petroleum.
Hmmm, Iām not sureā¦ I donāt think it is sure there are organic animals. There are undoubtedly plants, thoughā¦ But for animals, we only have hints of their possible existence; there isnāt any actual organic animal that has appeared (except the birds of For The Birds, but I would say that was just an Easter egg).
Yet saying organic animals are myths is an a bit strange explanation. Our legend creatures were inspired by real animals; from where would cars have the inspiration for organic animals ?
But if all animals are vehicles, that would remain the best explanation for me.
Anyway, John Lasseter has shown that his view is that all animals are vehicles of some kindā¦ I think that Pixar wonāt make appear any organic animals, at least on the foreground.