The streaming services only work if they are "better" than just downloading the content for free. My guess is that music has a much lower barrier, both in terms of availability and in people's tolerance to listen only to parts of a catalogue divided along record company lines, so if only 25% your top 40 (or 90s or whatever) was available on SONY Streaming, you'd just say fuck it and download it.

Somehow, the video landscape has shaken out to have generalist (Netflix,maybe Amazon) and specialty content, not all that different from cable. So people are used to it that way. And come to think of it, radio generally plays music from all record companies, so there is a precedent there too.

With more fragmentation, particularly with Netflix losing it's generalist position and having more self-produced crap, I suspect that downloading movies is going to become viable for more people