It's all about conspicuous consumption. Showing that you have more money than brains is supposed to make you look cool. To me, it makes you a retard. I have no problem with a TV in a car, and in fact, one of my ideas is to build a Carputer with the touch screen in the dash between the vents (on a Cutlass) and use it to run navigation, in car web surfing, radio, a 500gb external hard drive to store music and videos, and maybe even a TV tuner. Do I need TV's everywhere, like on a really bad episode of "Pimp My Ride"? No. (BTW, the worst were one in the spare tire UNDER a truck, and ones in the ends of the bumpers!!!) To me, everything should feel integrated into the car, not tacked on. I fail to see how 20 TV's in weird places is integrated.
In the end, figure out what you want in your car, and then figure out how to make it work. Screw everyone else's ideas, most of them suck. Plus, most magazines are interested only in featuring show cars built by manufacturers to sell equipment. I learned long ago that magazines may be good for ideas, but most of the editors are not as smart as I am nor as good with cars as I am. They are there only as shills for their advertisers and will review whatever they get free that month. There is very little journalistic integrity in most car magazines. The same goes for "The Power Block" on Spike. Every show is a 30 minute commercial. So, find your own road. An intelligent man makes his own path, and then lesser men follow behind him.