Horace Dediu with some thoughts on upheaval in an industry. The rest of the interview is worth a read.

The way to think about it is this: The stone age did not end because we stopped using stones. Same with the iron age and the industrial era. The era of jet travel did not end automobile or even ship travel (though that changed to recreation rather than transportation for passengers.) Each phase of technology does not fully replace its predecessor. It offers a new set of solutions and perhaps a slightly different way of solving old problems.