Before anyone gets too excited about the Red Hot Chili Peppers and Metallica not giving out music on the Apple Music Store, you might check the quotes (from here).

"Our artists would rather not contribute to the demise of the album format," said Mark Reiter, with Q Prime Management Co., which manages the Red Hot Chili Peppers, Metallica and several other artists.

...

"We can't let a distributor dictate the way our artists sell their music," Reiter said, adding that the business terms were otherwise acceptable.

That's understandable. If you only have a few good songs on a album, I can see this being an issue. You'd like to charge more for the good ones, so to speak. Now if all of your songs are good, hopefully the "samples" you can get on the Music Store will show that and people will grab them, but even so I can see the complaint.

But the important bit here is that the issue isn't a technical one, or even one against digital, online music purchases. It's a financial/culture one. I'm betting it gets solved. Eventually. I mean heck, they aren't there now. It's not really "news" for store users.