I think what it means is that internally, your DVD will perform operations using 192kHz (i.e., oversampling). However, it will "only" output at 96hKz (basically, around double the sampling rate of CD, which is 44.1kHz). I think optical interconnects have less chance of causing a ground loop or having interference caused by external electronics. However, I compared my fancy optical (glass) interconnect with a coaxial interconnect and liked the sound from my coaxial better. Test it out and see what you think.
