The HIFI industry as we know it has slit its own throat, with boutique products at boutique prices. Brick and mortar stores can't afford to stock much in the way of boutique, and no-one likes to wait for something special to be ordered (perhaps with a 10% restocking charge). So Brick and mortar sell cheap fi to satisfy the masses with limited purses, and the boutique stuff is all on line.
Like many cultural societies, it has become the "haves" and the have nots". If you don't have $5,000 to spend on a cheap, boutique preamp, you either hunt on Craig's List or eBay, or you go to Best Buy and settle for something that they have.
I see this trend (and the gap between them) getting larger and larger, until the baby-boomer era is over, or the US economy tanks again, which will kill both e-commerce and brick and mortar.
The other "leverage" bar in the retail business is how unfair, unbalanced the game is played. E-tailers by and large, do not charge any sales tax, have their wearhouses in states that do not have high taxes and can undercut brick and mortar stores considerably, who by the way, have to charge sales tax, pay property and business taxes on the store and in general, are a sitting duck as far as trend movements go.
Brick and mortar can't win because of the unfair advantages. Without competition, prices will increase with e-retailers until they have reached a breaking price point.
It all, and I do mean all goes down the money trail.
With the kids becoming iRobot with the iPad/iPhone and learning not to share their music (hence the $200 Beats headphones), there will be no need to buy a system to "share" music, because it is not in their understanding. So in the end, hifi dies a sad death.