Dixons started to go downhill after the pc world merger. Once upon a time you could play price wars with dixons, currys and pc world.. And comet. Now there's just the one.
All the big cos seem to be merging no matter what the industry, soon we will be left with hardly any choice. Same with ISPs, LLU was supposed to give us more choice, but I dunno, it actually seems more limited these days.