I recently bought a 6s Plus and was offered some tuition in the new features from ios9 but as most know that in the 6s/6s Plus it's capable of taking 4k video. But why don't Apple say, when, they walk you through the new features that its not set by default. 1080p is set by default. I don't mind but in keynotes they put all the emphasis on 4k video so why not tell you in the walk through its there but not enabled by default.