I'm now convinced it is a bad idea. But I don't see it being good for local at all.
So I agree with the other commentor, they exist to extract local money, to make a few locals rich, the manufacturer's piece of the pie is whatever they think they can charge either way. If you cut out dealerships you make prices less obscure and force manufacturers to compete more closely with one another, and also save the middleman rent-seeking.
Cars are odd. Shipping is not cheap on them. And will never be cheap. If there is not some contractual obligation to ship inventory closer to consumers, I see little reason to think prices won't go up in a market that is dominated by direct sales.
Making money on the back through financing or upsells is normal.
Fun times for all.
I'm game for how this week help local folks, though. My gut is it will just be fewer rich people at the very top of these companies.