ContentScaleFactor

Hi guys! I was looking through 1.4.4 when I found a variable in the auto-complete which I hadn’t seen before, ContentScaleFactor. In the reference it says it is the scale applied to images and sprites. I see that you can use this to determine whether the device is retina or not, so I ask: Is there any other use for it, e.g. Getting the scale amount applied to the viewer?