I expect the camera to be the marquee feature on the new iPhone 6s and I wouldn't be surprised if Austin is right about most of these; his main predictions seem to be buttressed by lots of other reporting. The thing I hadn't considered was the use of force touch as a means of quick access to the camera, which would be great. The current swipe gesture has been really fiddly on both of the 6 Plus devices I've owned in the last year, with swipe working only 50% of the time or so. I've missed a number of "precious moments" with my son by not being able to get to the camera quickly enough.
I sold my 6 Plus this morning to be ready to pre-order the new one next week.