It has been CC for a long time now.LR is both retail and CC. It is the only one that I know o=f that it. One new feature is Lightroom Mobile. It's for the iPad and it is a CC feature for doing some workflow on the iPad and syncing between iCloud and the ipad and desktop. It uses collections so you can work in an iPad and then ave it sync back to the desktop.
What they don't tell you until you get to the App Store is that Lightroom Mobile requires iOS 7 or higher. I have a version 1 iPad, with no camera, where iOS 5 is the latest OS it runs.
I downloaded and installed LR 5.4 as I would have done anyway, mobile or no mobile. Then I activated my 30 day trial period. Only then did I go to download the iPad app then to find it requires iOS 7. So my 30 day trial is running but I can't use it without buying a new iPad. At some point Adobe made the decision that people with a non-camera iPad wouldn't be interested in LR mobile.
I probably should go out and buy a current iPad but there are not enough compelling reasons for me to do so yet.
Being a new convert to LR and having joined up for the $10 CC Photographer package this was a pretty cool bonus. I have only played with it a bit on my iPad Mini but it does seem to be fairly powerful for a tablet app. Since I have not done collections yet I had to create a small one to play with you can not sync from your folders. I have pretty fast cable WiFi at home 30 Mbps to 50 Mbps and sync was not super fast I only sync'd 3 photos and it took just about 3 minutes.
Yes, it apparently does this. Here's a photo I imported onto my iPad using the Apple camera connection kit, imported into LR Mobile, and editted mildly (just a crop and Clarity adjustment). It sync'd to LR on my iMac while I was answering the phone. In LR it shows up in a Collection called "From LR mobile" (clever name).
I shoot Raw+Jpeg, and the sync'd file is a jpeg with the correct file name from the camera (which the iPad usually hides), and all of the non-destructive LR edits attached.
In the past, I've edited on the iPad while traveling so as to see what I shot, and to share with friends and family while we were away. I then had to redo the edits when I got home. To the extent that LR has adequate editing capability compared to the other tools I use on the iPad, this could be even more useful.
Life is what happens while you're busy making other plans
I sometime shoot with my iPhone (not so much with iPad) when I do not have cameras. LR mobile is a big plus for me for that reasons, though I need to transfer it to iPad at the moment. I can not wait for iPhone version.
Also it is great tool to show the edited photos quickly through iPad mini.