I think canon needs to achieve a much higher dynamic range now as well. I think that is a major factor in why arri dominated the oscars. Another factor that makes the arri sensor look better is its ability to clearly distinguish colors variations. See this article comparing red dragon,epic and alexa. When shoot a chart with the red epic the vector scope shows the points with much more color smear than the alexa. A smeared color patch means that hues along that smear will all look the same. There won’t be much subtlety between hues. http://www.dvinfo.net/article/ultra-hd/dragon-color-does-tungsten-or-daylight-make-a-difference.html