Even if HTC had a better camera in the M8, how many more would it sell? Today's food for thought.
The iPhone and Samsung is what is on Joe/Jane's radar blipping endlessly.
Can't speak for anyone else but... I've only ever owned iPhones. Each year I'm more and more tempted to move to Android (mostly because I want a bigger screen). The HTC One is the only Android phone I would even consider. Won't do it if the camera is no good though. So not a guaranteed sale here but they did take themselves off of my very short list by not improving the camera.