If you're selling me something very big and expensive I better get a chance to look at it up close and try it out. If you're going to charge me for that experience then I will go somewhere else.

What should happen is the car manufacturers buy out the best dealerships and simply sell the cars direct. It'll allow them to optimize their distribution and inventory channels and give them a bigger margin overall. It's going to put many dealerships out of business but it's an old business model that no longer works in the world; you can't expect to keep it afloat when there is no good business reason for doing so.