Apple started in the music business from scratch with a host computer dependent device as well - execution seems to make all the difference. Of course, today no

Apple started in the music business from scratch with a host computer dependent device as well - execution seems to make all the difference. Of course, today no-one would accept such a device, but back then it was the norm. I think the difference is that Amazon was already in a prime position to grab the digital book market, while for music there was no company in such a position.