I wonder if Logic Pro follows a similar path.
It probably will.
If you look at WWDC from last year, they basically took Aperture, and made the core a part of OS X itself, with APIs that do photo processing. You would think that those APIs were part of Aperture, but they're right in the OS itself. That's in addition to the RAW conversion that the OS already does.
I see a situation where things like Nik filters and maybe even Photoshop itself is basically an OS X plugin, that works on the OS X Photos database. (The Photos app is exactly a plugin that operates on the OS X photos database..)
It basically eliminates the need for Lightroom, when it's built into the OS.
And this same process can happen with the sound side as well. We will know if Apple releases new OS X APIs for sound processing in the next few WWDCs...