Apple's iTunes download page for Mac and Windows continues to offer iTunes 12.1.2, but the company added an "iTunes 12.2 coming soon" note. Apple Music, which launched earlier on Tuesday with iOS 8.4, requires iTunes 12.2 on Mac and Windows, and its absence has been greeted with annoyance and snark on the Interwebs.
Apple's iTunes webpage:
iTunes 12.2 Coming Soon
Note that as we were preparing this story, the "coming soon" didn't show up in Safari on all Macs, even though they were all running OS X 10.10.4. In other words, you might not personally see the "coming soon."