If you recall, Circuit City vanished a few years ago after a several decades as a leading nationwide retailer. Part of this was surely caused by direct retail competition by Best Buy, Target, WalMart, but it would be reasonable to presume that at least a part of this was caused by technological advancement as well (it certainly couldn't have helped circuit city to have to compete with NewEgg and Amazon)
DIVX (http://en.wikipedia.org/wiki/DIVX) was another important catalyst that helped Circuit City to fail. If you're interested read the link but the short of it was that it cost Circuit City over $100 million not to mention that anyone that was into home theater basically refused to shop there after this fiasco.
