This is very useful. In my case I copied something from another document into my current document. The pasted image hasn't been flattened or de-selected yet, but unfortunately I hit "paste" instead of "paste into new layer". I believe photoshop has the ability to convert an un-flattened, un-de-selected selection into a new layer, but when I try clicking "new layer" in this state, it flattens the image first, then gives me a floating outline with no pixels in a new layer, which really isn't very useful. Would be great if when there's a recently-pasted, not-flattened-yet selection, if clicking "add new layer" would just transfer the floating selection into a new layer instead of flattening first.