For the average user, standard leads are good enough, they do the job, you get a picture, nice.
But for the audiophile, that seeks out top end gear, connections are the be all and end all..
Your average punter watches TV, but the purist 'sees' TV; someone might hear music, but a purist 'listens' to music..there is an added dimension.
So if someone buys a cheap LCD in a supermarket, no expensive lead is going to improve it.