Radiator Springs works great for the immersive single-IP kind of land that it is, but it would be a dreadful addition to WDW Magic Kingdom.
This version of Piston Peak is a bespoke area built for the needs of our specific Frontierland. This isn't Carsland in any sense of the phrase, it's a Frontierland ride with Cars. It shows off the American countryside, lots of water features and cool mountain ranges, it's all about journeying west through the wildnerness; simply told through off-roading with the Cars characters. That's the hook to get people to ride. I think it's legitimately cool to see something like this get greenlit, especially in this era where everything has to be connected to a larger IP land like Pandora, Batuu, Diagon, or Super Mario Land. This is a lot more like the New Fantasyland additions, which gives me hope that this should fit the structure of Magic Kingdom much better than just plopping down Radiator Springs in the middle of RoA.