True. Probably not. It will evolve over time of course, but the instruments used in rock will never die I don't think. To begin with: on a base, simplistic level, humans have been attracted to the rhythmic beat of percussion instruments almost since the beginning of time. Humans are also tactile and aurally stimulated creatures, and they like instruments that can played to make many different sounds (like guitar, bass, keyboard, etc.) There is also such a variety of instruments that can be played in rock that can create so many sounds and textures, and when you combine them, the possibilities are literally endless. Because of that, I don't think it will die.
TPBM believes rap/hip hop will eventually die.