I just can't see it happening in the near future. Do classical and jazz music companies expect their clientele is going to completely convert to music downloading? It's just not gonna happen. They might as well drop an A-bomb on their entire market demographic and kiss their recording sales goodbye...and with symphony tickets going for an average of $90/each (and much higher for a seat in the actual hall), the classical music industry needs to sell recordings.
There will continue to be a physical music delivery system, whether it's a silver disc is another question, but downloads will not be the only method of buying music.