I like the idea of show rooms and trial centers. There are only a few things I would add.
1.) A car is a big purchase, so I'm not sure I would be comfortable just driving on a track. How about being able to take it on the streets I drive everyday? Maybe even borrow the vehicle for a few hours, make sure it fits in the garage and show it to my family, (my wife hates going to trial centers)?
2.) After borrowing the vehicle for a little bit, I may want to buy this exact vehicle right now. I think these trial centers should allow me to purchase the car today.
3.) But, I already have a car that I need to get rid of. It would be cool if these trial centers accepted my old car, and used the equity to lower the price of my new car.
4.) I can't afford to write a check for the entirety of my new car, so if the trial center could contact a bank, or maybe several banks, and give me financing options, I'd appreciate it. Maybe the same guy at the trial center can price out extended warranties.
5.) Maybe attach these trial centers to service, parts, and body shop departments. People seem to like stuff like that.
Literally none of those things apply to me, or many other people.
I pay cash for cars. But If I was going to finance, I'd do it through my credit union.
I don't mind waiting a bit for the right vehicle, as long as it is not in the dealership waiting room. I'll wait a few weeks to have it delivered.
I'd rather sell my car on the private market, where I will actually get a fair price for it.
Extended warranties are not worth it.
Service centers at dealerships are a rip off. Only good for warranty service. I prefer a trusted independent mechanic.