> Today, our means of synthesizing sound, imagery and even intelligble content I think dwarf those to which Cage was ever exposed.

I think Cage would've been totally unimpressed with our technologic "mastery" of the control of sound. His work revealed that the control of the structure of sound was approaching a cul-de-sac (hence his boredom with Tschaikowsky/Bruckner/Stravinsky) and therefore a very limiting perspective on what is beautiful/emotive or even what it means to be "music".