The hub lists artists from a variety of different genres, with impending albums from Panic! At The Disco ("Pray For the Wicked", June 22), Florence + The Machine ("High As Hope", June 29), Interpol ("Marauder", August 24), and more. With only about 10 albums listed, Coming Soon isn't an entirely definitive source of every upcoming album on Apple Music, but albums have been added to the section throughout the morning so it appears Apple will be continuously expanding this area.
On macOS, there is a drop down menu for sorting options, but it only has a "Recent Bestsellers" option at this point. Apple could update this to make it even easier to sort upcoming albums by release dates, genres, and more. On iOS, however, there is no sorting option at this time.
In another addition, Apple is now making it possible to easily see album launch dates on their respective pages on iOS and macOS. In the Editors' Notes section, following the traditional encouragement to add the pre-release album to your library, there's a new line that begins "Album expected..." followed by the album's specific release date. Some albums not listed in Coming Soon still have a release date specified on their pages, so this update appears to be a bit more wide-ranging.
Lastly, another rollout appears to be happening today in regards to artist profiles, showing up as of now only in iTunes on macOS. These profiles have a slightly tweaked layout with artist portraits in circular bubbles, and a "Featured Release" that includes release dates.
There's also a "Play" button next to the artist's name, which was first noticed by iOS 12 beta testers and appears to be launching now for all Apple Music users, although as of writing MacRumors has only seen profile updates on a computer running macOS 10.13.4 and not on iOS. This button shuffles all of an artist's music at once.
The Coming Soon tab and release dates have appeared for multiple users on iOS 11.4, as well as on macOS 10.13.4. Apple didn't mention Apple Music during its WWDC keynote and at this time doesn't appear to be planning a major update to the app this fall. Besides the updated artist profiles, iOS 12 beta testers have discovered that subscribers will be able to perform searches for music via lyric snippets.