I never said these were in any way convenient, all I said was that it was an
"interesting" thing to do. Moreover, if done properly, you can quite easily implement screens of the back of the front seats, put one in the compartment usually reserved for the radio or two smaller ones on the sun visors above the driver's and passenger's seat and so-on and so-forth without making it look tacky - in fact, some dealerships have stock car models with such features. Adding a console would be a matter of hooking it up to the car battery and putting it in the gloves compartment...