I have to say, no AD can offer the experience level available on-line.
My iPad is a great place from which to shop for a Rolex, a Gibson guitar, an Infiniti, a BMW and any number of other fine products.
I haven't found a jewelry store as comfortable as my den, maybe I'm shopping in the wrong cities.
I shouldn't say no AD
can offer that experience, they can, and would if not for the prohibitions in the dealer agreement.
This article today
How Sales Has Changed in the Information Age covers some of what the manufacturers are fighting, though the article has a B2B focus.