I agree that the music industry(barring the use of their impressive lobbying clout to simply start raiding the public purse and transferring the contents directly to one of the dreadful royalty collection entities) is pretty seriously screwed. I'm just not sure that Apple is a good company to get in bed with to try to solve that.
I'm thinking back to the sequence of events surrounding the the original ITMS, with track-based sales. Team music was largely enthusiastic, finally somebody actually competent to give those damned pirate kids an easier, relatively palatable, option for being paying customers again. And, in part, it worked. Unfortunately for Team Music, Apple proved to be a bit too competent, 'Playsforsure' and its planned ecosystem of interoperable devices and competing music stores basically crashed and burned, Real did something so pathetic that I'm hard pressed to remember it; and the upshot was that they ended up having to sanction the sale of MP3s through Amazon, often at 20 cents or so less, per track, than ITMS, just to keep Apple from being the ultimate gatekeeper.
With streaming services, I suspect that Apple will again be the competent guys(even if they are no more competent than their competitors, they have integration with ITMS billing, and a giant pile of customers with credit card information already punched in, and they have privileged access to iOS, so anything their streaming app needs to be better than everyone else's streaming app(whether it be more lenient treatment of the process when running in the background, special RIAA-and-major-studios-blessed 'secure' local storage for 'predictive caching' when bandwidth is cheap and abundant(ie. on wifi, also handy because Apple easily has enough reach and clout to realistically push some CDN/caching hardware to retail partners if that makes economic sense: Starbucks, say, already has some interaction with Apple in selling music, they'd probably be willing to plug some suitably-modified Time Capsule based local cache into their network, assuming Apple made it low hassle enough); as well as the general competence of Apple's consumer software development.
Given that the streaming market already doesn't pay worth a damn, even with multiple competing entities who are trivial to switch between, all pretty similar to use, and live and die by their catalogs; I can't imagine that their cut of the action will get better if Apple comes in and crushes Pandora and friends and is now in position to dictate terms(extra fun if Apple decides that promotional visibility, and/or the privilege of being sold in the ITMS at all, will now be predicated on how cooperative you are with their streaming plans, and any other future developments).
Given that piracy is always attractively priced, and often surprisingly user friendly(sure, sleazytorrent.ru has more ads for sex chats and korean dating services; but 'click "Artist_Name_Complete_Discography_FLAC.torrent", receive complete discography of chosen artist' is pretty frictionless; team music can't afford to entirely spurn the more competent outfits looking to sell music; but if I were them I'd be very, very, nervous about Apple both being a bit too competent, and (since Apple makes basically zero on music sales; but uses them to enhance the value of the products that they do make money on) a 'partner' who really doesn't share your goals.
Companies that want to make money selling music, or access to music, will haggle with the artists and labels over the cut that goes to the artist and the cut that goes to them; but they are fundamentally interested, just like the artists, in the public spending more money on music. Apple or Microsoft or Google? They have the virtue of being able to build slicker-than-piracy products, since they all know something about UI/UX, and have privileged positions on the world's desktops, consoles, and mobiles; but none of them have any obvious reason to want increased public spending on music. Indeed, all of them have various non-music goods for sale, many directly competing for the same peoples' limited supplies of discretionary income. None of them would be dumb enough to actually risk a zillion infringement lawsuits; but all of them would view artists and labels as, like other OEMs and suppliers, necessary but unfortunate expenses to be reduced as much as possible.
Being the musical equivalent to Microsoft's subservient PC OEMs, or Apple's various tyrannized suppliers, or the companies that kiss Google's pinkie ring(precise terms unavailable in public) to ship 'real' Android, not AOSP, would not be a pleasant experience.
I have absolutely no clever theories about what Team Music should do to try to capture more of the available discretionary income(even without piracy, they have the problem that movies, video games, gadgets, cable bills, etc. are gunning for roughly the same slice of money that they are. Even people who wouldn't touch piracy still have more entertainment goods competing for their attention and cash); I just suspect that throwing in with a party as powerful as Apple, and one that is largely indifferent to music sales, so long as they can add "Music!" as a feature to the products that they actually care about, will end well for them.