currently when you use the amazing camera raw on a layer, it opens a separate interface which is great, but... alas, if you are in need of color matching you are facing a problem because you can't see the color correction in the composite psd document until you close camera raw.
if camera raw could be applied in both windows or have a view of the composite in camera raw as one of the views at the bottom this would be amazing. (btw, spliting the views with a way to actually move the split vertically or horizontally and not the layer would be nice)
if you want an example this is same as a color correction is applied to layers as an effect in after effects.