Images that express what life FEELS like are the ones we remember. They matter. Sadly, they don't often just happen.
We make a photograph while electrified with feeling about what we see, but all too often the result is so much less. The damn image lies there before us, sad, dull, empty; proof we don't know a damn thing after all.
Camera Raw, the brilliant Lightroom raw image editing engine, is suddenly an always available, all-purpose Photoshop tool.
Let's say you have an image open in Photoshop ready to edit. You've been working a lot in Lightroom and your reflexes are tuned to the Lightroom develop module sliders and tools. The most convenient way to get from point A to point B would be to tweak some sliders and watch the image respond, but you're in Photoshop, so...