There is a certain amount of confusion amongst consumers that are passionate about sound as to what audiophile really means in the context of cables. For some, it simply means expensive, whilst for others the term is synonymous with quality and crisp, clear sounds.
Either way, however you define audiophile cables, knowing if they are worth buying will still remain subjective, and it will all depend on what you want to get from your audio system. There are those who love music but spend more time worrying about the quality of their stereo system than they do actually enjoying the music they are listening to. Others will pay very little for their speakers or their cables and will care far more about simply sitting back and listening to music than whether or not they can get better EQ or lossless audio through a better cable.
As such, it is hard to say whether such cables really will improve your experience. However, what can be said is that these high-end cables will indeed vastly improve the sound of any audio, whether you are watching a film and truly want to experience lossless audio, or whether you are listening to music and want to hear it exactly as the artist intended.
In many cases, individuals throw money away paying out for the best quality speakers, without considering that even the very best speaker will only operate to a fraction of its potential unless the right audiophile cable is used to transmit the signal.
Cables alone will not a great audio system make. Every aspect needs to be focussed to get the best possible sound. But if you are prepared to pay out for the right amp and the right speakers, the right cables will suddenly be a must, and may indeed become the finishing piece in your audio puzzle.