Can someone explain, in lay terms, why I should pay more for a Coaxial Interconnect?

Was reading a review of Coaxial Interconnects and have questions.  The reviewer claimed there was a great difference in the sound of his test system, depending on the interconnect being used.  My favorite line was "the music danced like fire from my speakers".  His actual words.  Not sure if I want the cable he was using or what he was smoking.  So, my limited understanding is this.  The CD transport reads and produces a digital signal. This is a series of 1's and 0's, as are all digital signals?  The signal is then transported via interconnect to the DAC, where the heavy lifting is done and the 1's & 0's are converted to an analogue signal that the speakers can understand?  If the sole purpose of the Coaxial Interconnect, is to carry the digital signal about 3 feet between the CD transport and DAC, how can it possibly have any impact on the final musical output from the speakers?  Would love to know how a $4000 cable is going to make my system sound any better than a $150 cable.