That is exactly the reason DAB and Eureka never caught on here. This is America, the place where we value equality, except on the dial. There, we desperately cling to our pre-war frequency and power allocations to make sure that some stations are "haves" and others are "have nots".
It would be a terrible thing if every station in a market came in clearly and at the same strength. Then the only thing you would have to differentiate yourself with would be the quality of your programming. Heaven forbid it should come to that!