No, the car is very different from the shoes. The shoes work the same way as in the movie (they have an electric motor that does the laces in for the user). We don't know if the real world product can't be adjusted to be faster for example. But the way it works is the same as in the movie.
Now the cars are very different, hover cars work and achieve flight in a totally different way a airplane car does, also all the air plane cars in real life require a landing and liftoff "strip" (so they land and lift horizontally) while in the futuristic products they just lift or land vertically, they also do not use wings. The way they work is through very different means and very different technology than the real world ones. While in the case of the sneakers, they work through the same hardware and achieve the results the same way, with the difference being that the real world ones are a bit slower (and again, we have no idea if we can't just speed them up).