Don't they have the internet at Harvard Business School?
Big box electronics stores are dead - deader than a parrot that's been run over by a steamroller while pining for the Fiords. Wake up guys, even my gran buys this stuff online!
Nobody is going to miss Dixons staff, $80 HDMI cables and attempts to sell $100 extended warranties on a MP3 player.
The only bit of Best Buy that made sense was Geek Squad, at least for the 99% of people that seem to be confused about which end of an HDMI cable to plug in the back.
A business based on Geek Squad type outfit charging you a fee to help you pick a TV online, sync with Amazon etc to be there when it's delivered, set it up for you and be there when it breaks - could work. Manufacturers could even bundle Geek squad instead of their own appalling service support.
Apple have figured this out, one of the reasons the 99% used to buy Apple computers was that they could go and get help from a person that had a reasonable chance of being able to actually help them.