8.1 - Apple Pay
8.2 - Photos in Yosemite
8.3 - Apple Watch
This to me also seems pretty close, but there were also rumors of the iPad multitasking and such which could be in either 8.1 or 8.2.
Apple is clearly working on transit for Maps, but its sounds like that won't be in any iOS8 update and has been delayed likely until iOS9. The maps team seems to be in disarray.
I just hope they fix all the Bluetooth and Airplay issues in iOS8.
Looking forward to Photos once it is all worked out, but I imagine its organizational features will be terrible because it won't have a folder or hierarchical structure like most Apple apps (at least until people get annoyed enough, like with iCloud Drive now and FCP X, etc...).