As Final Cut Pro X – and other modern video apps – are built on Frameworks from the core OS, those Frameworks sometimes provide clues to Apple’s thinking. One that we care a lot about is AVFoundation, which is the modern replacement for QuickTime at the application and OS level. We’ve seen this in the transition from QuickTime Player 7, which is built on QuickTime (both QTKit and the older C API). Unfortunately AVFoundation has lacked many features that are essential for video workflows, so I watch the features added to AVFoundation as a way of understanding where video apps might go.
Firstly, there has been a massive update to AVFoundation in Yosemite, and it appears we get reference movies back.