Stores like BestBuy, Fry's serve a purpose. Not everyone is an expert, knows how to comparison shop online, or even likes to do research. Many people have no idea what a home theater system or bigscreen hidef tv looks like. They have even less idea about the different kinds of home electronic appliances, brands etc. Going into a store like this gives people exposure, possibilities. The worst that can happen is they overspend on something, or god forbid use the GeekSquad. The best case scenario is they are able to make a first hand comparison of tv quality, looks, experience some decent sound, see and feel cameras etc, then they can go home and price shop, ask a friend to advise them, measure stuff to see if it will fit etc.
Returns are also much much easier at a local store. I also liked BB's warranty program for certain things, their phone service (which was easier to deal with and cheaper than buying the phone via the carrier stores). And you know, sometimes I just like to visit and browse, see what's new. I already miss CircuitCity and a few other big name retailers that were forced to close.
Instead of blaming the store, we should be blaming management which sets the policies and training, executives who take big fat paychecks and bonuses, and a corporate culture that simply won't work in today's economic climate.