Price. That's all
Was looking for a TV last week for a Christmas gift; having got an idea from the net about what's what, the reality is that PC World is perfect for the intermediate buying steps - look, feel, touch, examine and have a jolly good play with it. But then anyone with any sense will nip round the corner to pile em high favourites Richer Sounds to buy the thing for £90 less.
Maybe they'll learn one day. Even old codgers have learnt to shop around, and charging a chunk extra for something you can pick up for less than half a mile away is rank stupidity on their part. Is it any wonder they're struggling?