No, there's a difference between vividness and brightness. The yellowness of the yellow, the redness of the red, etc. With a matte film on the screen, the colors aren't as colorful. As I said, this isn't as important in a car, so the screens should be matte. If it comes glossy, then as I said, we have the option of applying a matte film to the screen with the added benefit of protecting the screen.
In fact, matte glass might be a bad idea. It's very easy to scratch and mar matte glass. So it's probably better to have glossy glass and a plastic matte film over it.