Sony Mobile is rolling a new firmware build for the Concept for Android Marshmallow that brings the camera app in line with the Xperia Z5 series. Sony has confirmed that only the app is updated and not the API2. The developers have also suggested that they plan to focus more on the camera in the future. The other main change is a fix for the Wi-Fi battery statistics.
From our quick initial test, there appear to be no changes in the camera app versus what we have on the Xperia Z5 range. It also carries the same 2.0.0 build number. The latest camera UI is also expected to hit Xperia Z3, Z3 Compact and Z2 users in the upcoming Android 6.0 Marshmallow update.