when speakers are placed equally distant from each of your ears respectively, you hear and perceive an acoustic image centered on you.
If you achieve this in a vehicle, the result will be the same.
The acoustic image is centered on you. not the vehicle.
And the acoustic image is centered on you regardless of which seat you sit in.
If you use a center channel to try and accomplish this, you will fail.
Using a center channel will make you focus on the center of the vehicle and they are excellent for watching movies if your main screen is in the center of the vehicle but they do not yield a true acoustic image which is centered on each person.
note; if you accomplish true acoustic image centered on each person, watching individual headrest/visor screens will seem natural.