I like the idea. Still don't get why we need dealers. Since this seems to give you a 3 day test drive, it seems perfect. Financing these days can be done from your computer, you go select the car, have it for 3 days to decide and done.
With my most recent purchase the dealer is just the middleman - I knew what I wanted, they put us in a car for an hour, and I ended up ordering it. I can even track it's progress online. Financing will be either through them our our credit union whoever is cheapest. No real need for the dealer other than that test drive and a place to pick it up.